Trends in European zoo collections in the 21st century

A general question: Can a rescued animal that died shortly after arrival and was never put on public display be even considered for this counting? I wonder if those cases even enter into the collection registry of such facilities In some countries those specimens are "property" of the environmental authorities, hence never officially part of the zoological institution that temporarily rehabilitates them. Usually final decisions upon their final destination are decided by these authorities and not by the zoo in question.
 
A general question: Can a rescued animal that died shortly after arrival and was never put on public display be even considered for this counting? I wonder if those cases even enter into the collection registry of such facilities In some countries those specimens are "property" of the environmental authorities, hence never officially part of the zoological institution that temporarily rehabilitates them. Usually final decisions upon their final destination are decided by these authorities and not by the zoo in question.

It is a difficult decision and for bats I decided not to include them. But as for cetaceans multiple rescued species lived multiple years and even the ones that were short lived in the Dolfinarium were publicly visible (as opposed to all the bats) I decided to include them.

Property is a another issue, golden lion tamarins are also property of Brazil and not of the zoo, but it makes no sense not to include them.
 
It is a difficult decision and for bats I decided not to include them. But as for cetaceans multiple rescued species lived multiple years and even the ones that were short lived in the Dolfinarium were publicly visible (as opposed to all the bats) I decided to include them.

Property is a another issue, golden lion tamarins are also property of Brazil and not of the zoo, but it makes no sense not to include them.
I understand your point, but "property" is not the best word for this context. I just couldn't think about any better.
 
I think property is not a bad word to use as in a legal sense the relevant authorities might be considered as such. And i understand the challenge here, but as this is a high profile group of animals and some of them were kept for a significant time (plus some of them are known by name by the public) so their inclusion makes sense.

Will you continue with birds Lintworm? As that might be an even crazier task.
 
I think property is not a bad word to use as in a legal sense the relevant authorities might be considered as such. And i understand the challenge here, but as this is a high profile group of animals and some of them were kept for a significant time (plus some of them are known by name by the public) so their inclusion makes sense.

Will you continue with birds Lintworm? As that might be an even crazier task.

I am afraid I will continue with birds :p The master excel is finished, but we are talking about a multitude of species compared to mammals, so I am thinking of the right format. There are a lot more small species and a lot more short holdings of obscure species. So there are less stories about individual high profile species. Endless lists with years and zoos aren't very appealing, so the format will be slightly different. What is sure is that there will be a significant break between the end of mammals and the start of the birds.
 
I am afraid I will continue with birds :p The master excel is finished, but we are talking about a multitude of species compared to mammals, so I am thinking of the right format. There are a lot more small species and a lot more short holdings of obscure species. So there are less stories about individual high profile species. Endless lists with years and zoos aren't very appealing, so the format will be slightly different. What is sure is that there will be a significant break between the end of mammals and the start of the birds.
Will this be a new thread, or have you had enough recent thread of the year wins? :p
 
SUMMARIZING UNGULATES & CETACEANS

After primates the ungulates and cetaceans are the group with the largest net loss of all mammal groups covered, with a net loss of 13 species. Cetaceans lost half of the species kept at 2000 and even-toed ungulates had a net loss of 9 species from 118 in 2000 to 109 species in 2023. There are a few more species that are all but certain to join the list of losses in the near future with only singletons of hartebeest, mountain anoa, slender-horned gazelle, bearded pig and gray brocket remaining.

full

@amur leopard Bearded pigs are now a member of the last chance saloon
While the net loss has been sizable it was also unavoidable. Of the 4 cetaceans that have disappeared since 2000 none had ever bred in Europe and were represented by singletons, or in the case of sotalia dolphins by 2 old males. The situation of the remaining 4 species is largely unchanged. For all but the bottlenose dolphin the continued survival of them in European zoos continues to be dependent on 1 or 2 institutions. With bottlenose dolphins being at capacity currently in Europe and a likely increase in countries / regions banning cetaceans in the future, it is even questionable whether there will be captive cetaceans at all in Europe in 50 years time. That is certainly not a given, but given the welfare concerns, even among zoo-minded people, it is more likely than that dolphins will revive again. The huge costs of creating a new modern enclosure certainly plays a role here too. The best facility remains one built 25 years ago, which would be unimaginable for most other animals.

full

@snowleopard The Dolphin Delta in the Dolfinarium is still standing at the top of cetacean habitats in Europe

For the ungulates a part of the losses were also unavoidable and include animals that were never on show (Javan warty pigs) or not recognized as a species at the time (Cavendish’s dikdik). Most other losses (and coming losses) were of animals that were only ever kept or bred at 1-2 zoos, though in some cases clung on for decades. Such small inbred populations are always vulnerable, so it is no surprise some have died out. Others are still clinging on, but a species like the mountain reedbuck could with some bad luck easily follow the klipspringer and the pampas deer. That ungulates kept in small numbers tend to disappear is nothing new, what is new is that this century they are hardly replaced. In the period 1990-2000 some 8 ungulate species were lost, but it also saw the new arrival of 12 others. The big difference since 2000 is the difficulty with which ungulates can be imported into the EU. Until Poland joined the EU (and shortly afterwards) there was still a workaround and especially Poznan Nowe Zoo had a quarantine area that was a regular stopover for animals from outside the EU. This is also the place that became the Hotel California of the Javan warty pigs on their way from Surabaya to San Diego. Visayan warty pigs and Balabac chevrotains were the last truly new ungulates to come into the EU via Poland IIRC. But it was also used as a stopover for imports of animals already present in Europe, such as Thomson’s gazelles from Israel.

full

@Ding Lingwei With only a single male at the start of the century, the red goral was a certain loss
With that route closed only very few ungulates were imported to Europe anymore from other continents. Most of these imports came from the US, and specifically to Tierpark Berlin that has imported gerenuks, barbary stags, Chacoan peccaries, babyrusa, Thomson’s gazelles and more from the US since 2010. Tierpark Berlin was also the final destination of imports of Marco Polo argali and Sichuan takin from Moscow. Very few other zoos have gone as far as to import ungulates from outside Europe, which makes the gaur import by Zlin-Lesna in 2019 stand out all the more.

full

@Jackwow Thomson's gazelle have high name recognition but are rare in Europe and don't always adapt to the mixed-species enclosures in which they are often held

But changes to import regulations are underway, recently the BALAI directive was replaced by a new EU animal health law. According to the EAZA this should make it easier to move animals around within the EU. Under BALAI animals could only be transferred relatively easily between zoos that were designated as “ABIC”s, which had a provision that these establishments had to be free of certain diseases (including tuberculosis) for a certain amount of time. In the new law the approval as a confined institution (formerly ABIC) is not coupled to disease freedom, but based on animal health practices, policies and facilities in place. That should make stuff easier within the EU. It remains possible to import animals from 3rd countries, such as the US and the UK if they are labelled as confined institutions too. In practice it will probably remain very hard to import hoofstock. Had this been easier there would likely have been a much smaller net loss as enough zoos have indicated an interest in e.g. giant elands and klipspringer.

full

@Andrew_NZP If it were easier giant eland would long have made their way to Czechia

From the species that are kept in Europe it is apparent that ones gaining popularity are often endangered and managed in an EEP. This includes species that were already well established such as scimitar-horned oryxes, but rarer species also profit. Mhor gazelles, tufted deer, white-lipped deer and takins used to be real rarities, but are now rising in popularity to the point where some species are becoming “just” uncommon. In the near future this will possibly also apply to species such as Nubian ibex and Cuvier’s gazelle that 10 years ago were real rarities. The consequence is that some species now listed as phase-outs or were stripped of their ESB/EEP will either disappear or at least become much less common. This applies to species like gaur, east-Caucasian ibex and springbok. In the case of the ibex, breeding has ceased. But there are zoos ignoring the TAG recommendations and some places continue breeding gaur. Springbok were downlisted, but are a clear case where the species in question can’t easily be replaced by the species the TAG recommends, either because zoos use a stricter geographical approach or because the exhibits are not suited to the recommended replacements (which might be already present at the zoo too). That it can make sense to continue with species listed as phase-outs or which are not preferred is proven by impala and white-tailed gnu which were initially not recommended, but for which an EEP was created more recently. In the case of ungulates, gone often really means gone, so one has to be sure zoos won’t regret their choices. Many EAZA zoos treat the absence of an EEP label as a sign not to obtain a certain species when a reasonably similar EEP alternative is available. So for some species the future lies in the hand of a few interested zoos.

full

@gentle lemur Saved by the bell, when the value of Europe's white-tailed gnu was recognized, they were uplifted into an EEP, with 100 animals in Europe and 8 zoos breeding the past 12 months this species does have a future

Deer, antelope and wild goats aren’t exactly the animals that draw people to the zoo, though they do take up space. This means that in many traditional major zoos the number of ungulate species kept has been somewhat reduced. Holding capacity has however increased too as, especially in France, newer zoos have been adding ungulate species. Mixed-species savannas remain popular exhibits and it is increasingly common to see elephants or rhinos being mixed with some hoofstock species too. This ensures that even though less zoos opt for “endless” rows of paddocks there is space for the more “boring” species like hog deer too.

full

@Tomek Such enclosure rows are not the future of European ungulates

Zoochat had a pretty bleak view of how ungulates are doing in Europe, which is roughly correct. A single person expected a gain of tapir popularity and 2 persons thought suids would increase in popularity, which with the strong gains of Visayan warty pigs and red river hogs, is something that is correct in the number of holders. Cetaceans and ungulates, with bovids, caprids, deer and antelope as mentioned subcategories, were also often mentioned as having declined in popularity. For cetaceans that is true beyond doubt. For ungulates there has indeed been a net reduction in species, but not as big as in the old world monkeys and there are plenty of species that have made gains too. From a species hunter point of view there have been notable losses though, also of some unique subspecies.

Given the difficulty of importing new ungulates and the vulnerability of small zoo populations it is quite likely we will see more losses of ungulates in the near future. I do however think the number of species will somewhat stabilise at a high level given that many species are managed in EEPs or doing fine without them. It will be interesting to see whether non-EAZA zoos can continue to manage some of the species EAZA zoos are not interested in, but which could be “saved” just yet such as bighorn sheep. What is certain is that ungulates will remain one of the most widespread animal groups and there will be a large number of species that will remain to be kept. Just how much depends a bit on luck and on whether someone other than Tierpark Berlin is crazy enough to go through the paper battle of importing from non-EU countries. The US remains the most likely source of new imports, but given declines in number of hoofstock species kept there it will be interesting to see what they would still have to offer apart from a klipspringer or 2.

full

@Julio C Castro O klipspringer, when will we see your like again

This is really it when it comes to all the species, family and order accounts for mammals. There will be several summarising posts focusing on:
  • Why did most Zoochatters expect a decrease in species richness (when there is none)?
  • Summarising trends on families & orders
  • Which zoos were first/last holders and when did species appear or disappear
  • Is animal size (weight) a factor in mammal trends
  • Is the IUCN status a factor in mammal trends
  • What are the geographical biases in mammal trends
  • What do these trends tell us about the future?

Some information on the new EU animal health directive from the EAZA:
https://www.eaza.net/assets/Uploads/Zooquaria/ZQIssues/2021/ZQ111v6-web.pdf
 
Another big step forward was the realization that daughters won't breed in the same herd as their mothers, as they are being hormonally surpressed by the mother. So unlike elephants young females have to be moved out of their maternal herd quite early.

There's a great paper by Swaisgood, Dickman and White (2006) that I often refer to in discussions around the suppression topic. Something interesting that they highlight that F1 females housed with F0 females were more likely to have reproductive success than those housed away from F0 individuals. Obviously there's lots to unpack there, with many considering the importance of having a social group of females, multiple males to choose from (at least two), changes in diet as highlighted earlier in the thread, behavioural dominance... Alongside a million other factors.

Not trying to dispute either way as it's been a while since I refreshed my knowledge on the topic, but the paper is an interesting read!
 
SUMMARIZING UNGULATES & CETACEANS

After primates the ungulates and cetaceans are the group with the largest net loss of all mammal groups covered, with a net loss of 13 species. Cetaceans lost half of the species kept at 2000 and even-toed ungulates had a net loss of 9 species from 118 in 2000 to 109 species in 2023. There are a few more species that are all but certain to join the list of losses in the near future with only singletons of hartebeest, mountain anoa, slender-horned gazelle, bearded pig and gray brocket remaining.

full

@amur leopard Bearded pigs are now a member of the last chance saloon
While the net loss has been sizable it was also unavoidable. Of the 4 cetaceans that have disappeared since 2000 none had ever bred in Europe and were represented by singletons, or in the case of sotalia dolphins by 2 old males. The situation of the remaining 4 species is largely unchanged. For all but the bottlenose dolphin the continued survival of them in European zoos continues to be dependent on 1 or 2 institutions. With bottlenose dolphins being at capacity currently in Europe and a likely increase in countries / regions banning cetaceans in the future, it is even questionable whether there will be captive cetaceans at all in Europe in 50 years time. That is certainly not a given, but given the welfare concerns, even among zoo-minded people, it is more likely than that dolphins will revive again. The huge costs of creating a new modern enclosure certainly plays a role here too. The best facility remains one built 25 years ago, which would be unimaginable for most other animals.

full

@snowleopard The Dolphin Delta in the Dolfinarium is still standing at the top of cetacean habitats in Europe

For the ungulates a part of the losses were also unavoidable and include animals that were never on show (Javan warty pigs) or not recognized as a species at the time (Cavendish’s dikdik). Most other losses (and coming losses) were of animals that were only ever kept or bred at 1-2 zoos, though in some cases clung on for decades. Such small inbred populations are always vulnerable, so it is no surprise some have died out. Others are still clinging on, but a species like the mountain reedbuck could with some bad luck easily follow the klipspringer and the pampas deer. That ungulates kept in small numbers tend to disappear is nothing new, what is new is that this century they are hardly replaced. In the period 1990-2000 some 8 ungulate species were lost, but it also saw the new arrival of 12 others. The big difference since 2000 is the difficulty with which ungulates can be imported into the EU. Until Poland joined the EU (and shortly afterwards) there was still a workaround and especially Poznan Nowe Zoo had a quarantine area that was a regular stopover for animals from outside the EU. This is also the place that became the Hotel California of the Javan warty pigs on their way from Surabaya to San Diego. Visayan warty pigs and Balabac chevrotains were the last truly new ungulates to come into the EU via Poland IIRC. But it was also used as a stopover for imports of animals already present in Europe, such as Thomson’s gazelles from Israel.

full

@Ding Lingwei With only a single male at the start of the century, the red goral was a certain loss
With that route closed only very few ungulates were imported to Europe anymore from other continents. Most of these imports came from the US, and specifically to Tierpark Berlin that has imported gerenuks, barbary stags, Chacoan peccaries, babyrusa, Thomson’s gazelles and more from the US since 2010. Tierpark Berlin was also the final destination of imports of Marco Polo argali and Sichuan takin from Moscow. Very few other zoos have gone as far as to import ungulates from outside Europe, which makes the gaur import by Zlin-Lesna in 2019 stand out all the more.

full

@Jackwow Thomson's gazelle have high name recognition but are rare in Europe and don't always adapt to the mixed-species enclosures in which they are often held

But changes to import regulations are underway, recently the BALAI directive was replaced by a new EU animal health law. According to the EAZA this should make it easier to move animals around within the EU. Under BALAI animals could only be transferred relatively easily between zoos that were designated as “ABIC”s, which had a provision that these establishments had to be free of certain diseases (including tuberculosis) for a certain amount of time. In the new law the approval as a confined institution (formerly ABIC) is not coupled to disease freedom, but based on animal health practices, policies and facilities in place. That should make stuff easier within the EU. It remains possible to import animals from 3rd countries, such as the US and the UK if they are labelled as confined institutions too. In practice it will probably remain very hard to import hoofstock. Had this been easier there would likely have been a much smaller net loss as enough zoos have indicated an interest in e.g. giant elands and klipspringer.

full

@Andrew_NZP If it were easier giant eland would long have made their way to Czechia

From the species that are kept in Europe it is apparent that ones gaining popularity are often endangered and managed in an EEP. This includes species that were already well established such as scimitar-horned oryxes, but rarer species also profit. Mhor gazelles, tufted deer, white-lipped deer and takins used to be real rarities, but are now rising in popularity to the point where some species are becoming “just” uncommon. In the near future this will possibly also apply to species such as Nubian ibex and Cuvier’s gazelle that 10 years ago were real rarities. The consequence is that some species now listed as phase-outs or were stripped of their ESB/EEP will either disappear or at least become much less common. This applies to species like gaur, east-Caucasian ibex and springbok. In the case of the ibex, breeding has ceased. But there are zoos ignoring the TAG recommendations and some places continue breeding gaur. Springbok were downlisted, but are a clear case where the species in question can’t easily be replaced by the species the TAG recommends, either because zoos use a stricter geographical approach or because the exhibits are not suited to the recommended replacements (which might be already present at the zoo too). That it can make sense to continue with species listed as phase-outs or which are not preferred is proven by impala and white-tailed gnu which were initially not recommended, but for which an EEP was created more recently. In the case of ungulates, gone often really means gone, so one has to be sure zoos won’t regret their choices. Many EAZA zoos treat the absence of an EEP label as a sign not to obtain a certain species when a reasonably similar EEP alternative is available. So for some species the future lies in the hand of a few interested zoos.

full

@gentle lemur Saved by the bell, when the value of Europe's white-tailed gnu was recognized, they were uplifted into an EEP, with 100 animals in Europe and 8 zoos breeding the past 12 months this species does have a future

Deer, antelope and wild goats aren’t exactly the animals that draw people to the zoo, though they do take up space. This means that in many traditional major zoos the number of ungulate species kept has been somewhat reduced. Holding capacity has however increased too as, especially in France, newer zoos have been adding ungulate species. Mixed-species savannas remain popular exhibits and it is increasingly common to see elephants or rhinos being mixed with some hoofstock species too. This ensures that even though less zoos opt for “endless” rows of paddocks there is space for the more “boring” species like hog deer too.

full

@Tomek Such enclosure rows are not the future of European ungulates

Zoochat had a pretty bleak view of how ungulates are doing in Europe, which is roughly correct. A single person expected a gain of tapir popularity and 2 persons thought suids would increase in popularity, which with the strong gains of Visayan warty pigs and red river hogs, is something that is correct in the number of holders. Cetaceans and ungulates, with bovids, caprids, deer and antelope as mentioned subcategories, were also often mentioned as having declined in popularity. For cetaceans that is true beyond doubt. For ungulates there has indeed been a net reduction in species, but not as big as in the old world monkeys and there are plenty of species that have made gains too. From a species hunter point of view there have been notable losses though, also of some unique subspecies.

Given the difficulty of importing new ungulates and the vulnerability of small zoo populations it is quite likely we will see more losses of ungulates in the near future. I do however think the number of species will somewhat stabilise at a high level given that many species are managed in EEPs or doing fine without them. It will be interesting to see whether non-EAZA zoos can continue to manage some of the species EAZA zoos are not interested in, but which could be “saved” just yet such as bighorn sheep. What is certain is that ungulates will remain one of the most widespread animal groups and there will be a large number of species that will remain to be kept. Just how much depends a bit on luck and on whether someone other than Tierpark Berlin is crazy enough to go through the paper battle of importing from non-EU countries. The US remains the most likely source of new imports, but given declines in number of hoofstock species kept there it will be interesting to see what they would still have to offer apart from a klipspringer or 2.

full

@Julio C Castro O klipspringer, when will we see your like again

This is really it when it comes to all the species, family and order accounts for mammals. There will be several summarising posts focusing on:
  • Why did most Zoochatters expect a decrease in species richness (when there is none)?
  • Summarising trends on families & orders
  • Which zoos were first/last holders and when did species appear or disappear
  • Is animal size (weight) a factor in mammal trends
  • Is the IUCN status a factor in mammal trends
  • What are the geographical biases in mammal trends
  • What do these trends tell us about the future?

Some information on the new EU animal health directive from the EAZA:
https://www.eaza.net/assets/Uploads/Zooquaria/ZQIssues/2021/ZQ111v6-web.pdf
About the recent imports of rare species from overseas, we may also notice the case of the Yellow-backed Duikers, recently imported by Beauval (+ 3 German zoos) from the US.

And about a common, domesticated, species, there has been a massive import of 200 Domestic Donkeys from Israel in 2022, by the small facility La Tanière (that cares of wild and domesticated animals). These animals that belonged to peasants (and much probably poorly managed and in unhealthy conditions) have been imported to be saved from slaughterhouses.
It isn't especially interesting species-wise, but it remains relevant about the feasibility to import hoofed animals in EU, even in large numbers.
 
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I think that the end of the endless row of hoofstocks exhibits was detrimental for certain species. Expecially the little one. Gazelles and duikers aren't suited for stay with zebras and giraffes. Or the common case of the ostrich trampled by a giraffe (and don't breed).

The problem is that grass eaters are not so popular. Or nobody think at the potentiality of the small erbivore house/paddock (Pudu+Gazelle+Dik Dik; assured "AW" effect)

And if we talk about wildebeest, there Is a discrete population of C.taurus albojubatus in Europe. There are less than 6.000 of them in wild. Why there isn't an EEP of these things ? Ok nobody cares about wildebeest but at least try to fake an interess.
 
Did you consider, that Zootierliste data may be missing some species from 2000? Especially data on smaller zoos and species recognized only recently may be incomplete.
 
SUMMARIZING UNGULATES & CETACEANS

After primates the ungulates and cetaceans are the group with the largest net loss of all mammal groups covered, with a net loss of 13 species. Cetaceans lost half of the species kept at 2000 and even-toed ungulates had a net loss of 9 species from 118 in 2000 to 109 species in 2023. There are a few more species that are all but certain to join the list of losses in the near future with only singletons of hartebeest, mountain anoa, slender-horned gazelle, bearded pig and gray brocket remaining.

full

@amur leopard Bearded pigs are now a member of the last chance saloon
While the net loss has been sizable it was also unavoidable. Of the 4 cetaceans that have disappeared since 2000 none had ever bred in Europe and were represented by singletons, or in the case of sotalia dolphins by 2 old males. The situation of the remaining 4 species is largely unchanged. For all but the bottlenose dolphin the continued survival of them in European zoos continues to be dependent on 1 or 2 institutions. With bottlenose dolphins being at capacity currently in Europe and a likely increase in countries / regions banning cetaceans in the future, it is even questionable whether there will be captive cetaceans at all in Europe in 50 years time. That is certainly not a given, but given the welfare concerns, even among zoo-minded people, it is more likely than that dolphins will revive again. The huge costs of creating a new modern enclosure certainly plays a role here too. The best facility remains one built 25 years ago, which would be unimaginable for most other animals.

full

@snowleopard The Dolphin Delta in the Dolfinarium is still standing at the top of cetacean habitats in Europe

For the ungulates a part of the losses were also unavoidable and include animals that were never on show (Javan warty pigs) or not recognized as a species at the time (Cavendish’s dikdik). Most other losses (and coming losses) were of animals that were only ever kept or bred at 1-2 zoos, though in some cases clung on for decades. Such small inbred populations are always vulnerable, so it is no surprise some have died out. Others are still clinging on, but a species like the mountain reedbuck could with some bad luck easily follow the klipspringer and the pampas deer. That ungulates kept in small numbers tend to disappear is nothing new, what is new is that this century they are hardly replaced. In the period 1990-2000 some 8 ungulate species were lost, but it also saw the new arrival of 12 others. The big difference since 2000 is the difficulty with which ungulates can be imported into the EU. Until Poland joined the EU (and shortly afterwards) there was still a workaround and especially Poznan Nowe Zoo had a quarantine area that was a regular stopover for animals from outside the EU. This is also the place that became the Hotel California of the Javan warty pigs on their way from Surabaya to San Diego. Visayan warty pigs and Balabac chevrotains were the last truly new ungulates to come into the EU via Poland IIRC. But it was also used as a stopover for imports of animals already present in Europe, such as Thomson’s gazelles from Israel.

full

@Ding Lingwei With only a single male at the start of the century, the red goral was a certain loss
With that route closed only very few ungulates were imported to Europe anymore from other continents. Most of these imports came from the US, and specifically to Tierpark Berlin that has imported gerenuks, barbary stags, Chacoan peccaries, babyrusa, Thomson’s gazelles and more from the US since 2010. Tierpark Berlin was also the final destination of imports of Marco Polo argali and Sichuan takin from Moscow. Very few other zoos have gone as far as to import ungulates from outside Europe, which makes the gaur import by Zlin-Lesna in 2019 stand out all the more.

full

@Jackwow Thomson's gazelle have high name recognition but are rare in Europe and don't always adapt to the mixed-species enclosures in which they are often held

But changes to import regulations are underway, recently the BALAI directive was replaced by a new EU animal health law. According to the EAZA this should make it easier to move animals around within the EU. Under BALAI animals could only be transferred relatively easily between zoos that were designated as “ABIC”s, which had a provision that these establishments had to be free of certain diseases (including tuberculosis) for a certain amount of time. In the new law the approval as a confined institution (formerly ABIC) is not coupled to disease freedom, but based on animal health practices, policies and facilities in place. That should make stuff easier within the EU. It remains possible to import animals from 3rd countries, such as the US and the UK if they are labelled as confined institutions too. In practice it will probably remain very hard to import hoofstock. Had this been easier there would likely have been a much smaller net loss as enough zoos have indicated an interest in e.g. giant elands and klipspringer.

full

@Andrew_NZP If it were easier giant eland would long have made their way to Czechia

From the species that are kept in Europe it is apparent that ones gaining popularity are often endangered and managed in an EEP. This includes species that were already well established such as scimitar-horned oryxes, but rarer species also profit. Mhor gazelles, tufted deer, white-lipped deer and takins used to be real rarities, but are now rising in popularity to the point where some species are becoming “just” uncommon. In the near future this will possibly also apply to species such as Nubian ibex and Cuvier’s gazelle that 10 years ago were real rarities. The consequence is that some species now listed as phase-outs or were stripped of their ESB/EEP will either disappear or at least become much less common. This applies to species like gaur, east-Caucasian ibex and springbok. In the case of the ibex, breeding has ceased. But there are zoos ignoring the TAG recommendations and some places continue breeding gaur. Springbok were downlisted, but are a clear case where the species in question can’t easily be replaced by the species the TAG recommends, either because zoos use a stricter geographical approach or because the exhibits are not suited to the recommended replacements (which might be already present at the zoo too). That it can make sense to continue with species listed as phase-outs or which are not preferred is proven by impala and white-tailed gnu which were initially not recommended, but for which an EEP was created more recently. In the case of ungulates, gone often really means gone, so one has to be sure zoos won’t regret their choices. Many EAZA zoos treat the absence of an EEP label as a sign not to obtain a certain species when a reasonably similar EEP alternative is available. So for some species the future lies in the hand of a few interested zoos.

full

@gentle lemur Saved by the bell, when the value of Europe's white-tailed gnu was recognized, they were uplifted into an EEP, with 100 animals in Europe and 8 zoos breeding the past 12 months this species does have a future

Deer, antelope and wild goats aren’t exactly the animals that draw people to the zoo, though they do take up space. This means that in many traditional major zoos the number of ungulate species kept has been somewhat reduced. Holding capacity has however increased too as, especially in France, newer zoos have been adding ungulate species. Mixed-species savannas remain popular exhibits and it is increasingly common to see elephants or rhinos being mixed with some hoofstock species too. This ensures that even though less zoos opt for “endless” rows of paddocks there is space for the more “boring” species like hog deer too.

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@Tomek Such enclosure rows are not the future of European ungulates

Zoochat had a pretty bleak view of how ungulates are doing in Europe, which is roughly correct. A single person expected a gain of tapir popularity and 2 persons thought suids would increase in popularity, which with the strong gains of Visayan warty pigs and red river hogs, is something that is correct in the number of holders. Cetaceans and ungulates, with bovids, caprids, deer and antelope as mentioned subcategories, were also often mentioned as having declined in popularity. For cetaceans that is true beyond doubt. For ungulates there has indeed been a net reduction in species, but not as big as in the old world monkeys and there are plenty of species that have made gains too. From a species hunter point of view there have been notable losses though, also of some unique subspecies.

Given the difficulty of importing new ungulates and the vulnerability of small zoo populations it is quite likely we will see more losses of ungulates in the near future. I do however think the number of species will somewhat stabilise at a high level given that many species are managed in EEPs or doing fine without them. It will be interesting to see whether non-EAZA zoos can continue to manage some of the species EAZA zoos are not interested in, but which could be “saved” just yet such as bighorn sheep. What is certain is that ungulates will remain one of the most widespread animal groups and there will be a large number of species that will remain to be kept. Just how much depends a bit on luck and on whether someone other than Tierpark Berlin is crazy enough to go through the paper battle of importing from non-EU countries. The US remains the most likely source of new imports, but given declines in number of hoofstock species kept there it will be interesting to see what they would still have to offer apart from a klipspringer or 2.

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@Julio C Castro O klipspringer, when will we see your like again

This is really it when it comes to all the species, family and order accounts for mammals. There will be several summarising posts focusing on:
  • Why did most Zoochatters expect a decrease in species richness (when there is none)?
  • Summarising trends on families & orders
  • Which zoos were first/last holders and when did species appear or disappear
  • Is animal size (weight) a factor in mammal trends
  • Is the IUCN status a factor in mammal trends
  • What are the geographical biases in mammal trends
  • What do these trends tell us about the future?

Some information on the new EU animal health directive from the EAZA:
https://www.eaza.net/assets/Uploads/Zooquaria/ZQIssues/2021/ZQ111v6-web.pdf
This was a very interesting journey and it was super fun to see all these trends almost to the species level. Congratulations @lintworm for such a herculean job. It yielded very interesting exchanges of ideas too.

However, I wonder if the final result truly reflects the real picture that goes around. Just like in ecology counting the occurrence and non-occurrence of species in a whole composition of parts is a quite limited and sometimes misleading way to measure diversity. Precisely because many very rare species that are still occurring will tremendously inflate the result. I guess that if this assessment was done by measuring the average number of species held by each zoo (or the average loss observed by each zoo) the final result would give us a quite heavy loss. This could have been done for all species together and within taxonomic orders just like you did to find out who are the losers and the winners. When most zoochatters (not me included because I did not come on time to do the survey) guessed a big loss I think they are quite correct. We all feel that by picking a random zoo today we will see fewer species on average than in 2000. I do not know if ZTL allows you to take an easy snapshot of the number of species for each holder in a given year, but maybe it's an idea for you in 2025 to celebrate the first quarter of the 21st century.
 
Did you consider, that Zootierliste data may be missing some species from 2000? Especially data on smaller zoos and species recognized only recently may be incomplete.

Of course I did consider this, but I don't think it is a big issue. If you look at which zoos drive species richness currently and in the past on Zootierliste it is the big (Central European) zoos. For these zoos the Zootierliste data is of very good quality because data from a large number of older annual reports & stocklists are included. For small zoos this data quality is indeed lower and especially in the UK some specialities only occur in the small zoos. When looking at the data itself, only with small rodents was undercounting in 2000 possibly an issue, explaining the small increase in murid rodents. But if we are talking more than a handful of species, I would be highly surprised.

Species recognized only recently isn't really much of an issue I think, as most of those are already recognized as subspecies and often listed as such and can thus be accounted for. I don't believe there is a likelihood that this was more than a few species maximum and even that I doubt.

This was a very interesting journey and it was super fun to see all these trends almost to the species level. Congratulations @lintworm for such a herculean job. It yielded very interesting exchanges of ideas too.

However, I wonder if the final result truly reflects the real picture that goes around. Just like in ecology counting the occurrence and non-occurrence of species in a whole composition of parts is a quite limited and sometimes misleading way to measure diversity. Precisely because many very rare species that are still occurring will tremendously inflate the result. I guess that if this assessment was done by measuring the average number of species held by each zoo (or the average loss observed by each zoo) the final result would give us a quite heavy loss. This could have been done for all species together and within taxonomic orders just like you did to find out who are the losers and the winners. When most zoochatters (not me included because I did not come on time to do the survey) guessed a big loss I think they are quite correct. We all feel that by picking a random zoo today we will see fewer species on average than in 2000. I do not know if ZTL allows you to take an easy snapshot of the number of species for each holder in a given year, but maybe it's an idea for you in 2025 to celebrate the first quarter of the 21st century.

Unfortunately it is not possible to get easily data from Zootierliste on which species were kept in a zoo at any given point. I do have an excel sheet with all data on current holdings in Zootierliste in 2021 (Webscraper), so in 10 years time I could repeat it and make a comparison.

I think that there are many zoos that have lost species, but equally there are many zoos that will have gained species. Generally the older and/or space limited zoos will have lost species, but there are plenty of newer ones that compensate. When looking at the Netherlands the big 4 (Burgers', Artis, Blijdorp & Emmen) will all have seen a net decrease. But with Gaiazoo, Overloon & ZieZoo 3 new EAZA zoos were founded (and one was lost) and places like Beekse Bergen and Aquazoo also hold more species then they did back in 2000. The same goes for Belgium where any losses of Antwerp & Planckendael will have been more than compensated by Pairi Daiza. For Germany & Switzerland that picture might be less positive, but then France would more than compensate for that. I think it is more likely that there are less zoos with an extremely high number of species and many more zoos in the 40-60 mammal species realm. So I am not convinced that there is a large net loss in species held per zoo. I also recorded over twice as many species as gaining popularity (±140) compared to ones losing popularity (<60). A small part of that can be explained by quirks in Zootierliste information that make it more easy to count gains, but if there was a large net loss in the number of mammal species per zoo, you would expect this to be the other way around.

Many species kept in 2000 were also big rarities, that is nothing new. A sizable number of those rarities has increased in popularity (Visayan spotted deer and the like), many have been stable in the number of holders while remaining rare (blue duiker and many more) and many have disappeared. I think that the species with the largest net loss in terms of holdings are often still quite common ones such as nilgai, axis deer and long-tailed macaque.
 
White-fronted capuchin - Cebus albifrons
With only a single female remaining in Messingham Zoo, UK, the days of this species in Europe are numbered. It was never a very commonly kept species, though especially in the UK it wasn’t uncommon. As capuchins have slowly been replaced by more endangered (or at least EEP managed) South American primates in major zoos, this species was already for years confined to smaller institutions.
Does anyone know what species the white fronted capuchin at Messingham is from the split into 10 species from cebus albfrons (if that is correct as im no expert)? I believe she was originally at Ravensden before they closed and then to Sewerby, and then Messingham, if that helps at all?
 
Does anyone know what species the white fronted capuchin at Messingham is from the split into 10 species from cebus albfrons (if that is correct as im no expert)? I believe she was originally at Ravensden before they closed and then to Sewerby, and then Messingham, if that helps at all?

No idea, but that split is contentious anyway and in the Mammal Diversity Database it has been lumped again in the latest version.
 
On non-declining mammal species number and busting another myth

While there have been a lot of changes in European zoo collections, the overall number of mammal species kept was not one of them. In 2000 there were 637-647 species and in 2023 640-644 species, which if you take the average for each year would mean 642 species kept both in 2000 and 2023. So even when taking the uncertainty into account there has been basically no change. Zootierliste will of course not have been 100% accurate, but it is the best available and I don’t see much reason to not believe that the number of mammal species kept in Europe has been stable compared to the start of the century. Data quality for the most species rich zoos is reliable for the start of the century and even if 10 species were missed (though apart from a few small rodents, I cannot think of any likely misses), that would be a fraction of the total. A hypothetical decrease of 10 species to the 642 now would be quite meaningless.

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@Rhino00 Spinifex hopping mice are one species that could have still been present in low numbers in 2000, though it is more likely they had already disappeared before

Zoochatters did however overwhelmingly think that the number of mammal species had decreased. 74% of the people who filled in the questionnaire thought so and only 2 people (5%) predicted no change in the numbers, while 21% thought the number of mammal species kept had increased. The median expected change was a 13% decrease, which would have meant we would have had a net loss of some 83 mammal species this century, given we started off with ±642. Thankfully that did not happen. While there has been no change in the number of species held, most people who filled in the survey assumed that there would be more mammal species in Europe than there are in reality. The median expectation for 2000 was 800 and for 2023 was 723. So even with the expected decrease there was still an expectation of some 80 more mammal species in Europe currently compared to reality.

I think the most important reason for the overestimation is that it is genuinely hard to estimate these numbers, given that a lot of the diversity is hidden in rodents of which some zoos seem to have an endless amount. When making a list of captive mammals I had seen some years ago, I was also surprised how low my total was. Another factor, which was already mentioned by others is that Zootierliste also lists a plethora of subspecies, which further complicates estimating how many species are kept.

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@Therabu Barbary lion are one of the many, sometimes questionable, subspecies listed in Zootierliste, obscuring the actual number of species

As to the why people expected a decrease where there is none, I think there are 4 main reasons, 3 of which will be discussed in detail in this post. The first is that it is a favourite pastime of many Zoochatters to bemoan the loss of animal species X from a zoo/country/continent. Such negative stories often seem to have a bigger impact than the positive ones, as it fits into the general narrative of the site. This creates a sort of echo chamber where every loss is a self-fulfilling prophecy of zoos in general allegedly not caring anymore about rare mammals. Gains are still applauded but just seen as a way to somewhat decrease the overall loss. Many species that are lost also have been kept for just a short period of time, so don’t really count on any longer time span. What also happens is that we already calculate for future losses, there are some 30 species which we know will disappear, even though it might take many years in some instances. But these dead ends are a normal thing and 23 years ago there was a comparable number of dead ends as now. Most of those have indeed disappeared, though some have left that category because of additional imports. Species disappearing has always been a common part of the European zoo landscape, but until now these losses were perfectly compensated with new species appearing in their place. Whether this will likely hold in the future will be covered the final mammal post.

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@Jogy Eastern gorilla have been a dead end throughout the century, but could remain in Europe for another 20 years

Another part of the story seems to be how easy we forget that some species are relatively new. 24 years ago there were no black-and-rufous sengi, common cusimanse, greater guinea pig, Luzon giant cloud rats or Visayan warty pig in Europe. So while the gains from a few years back are taken for granted, the losses are bemoaned. The hard truth is that losses are just unavoidable in a world where the majority of mammal species is represented only by a few holders and a limited number of individuals. But that is also offset by gains, either from the private sector or overseas. It doesn’t do to focus only on one side of the equation.

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@HOMIN96 While only around for 20 years, it feels like bush hyrax have been in Europe forever

Not only is there a common belief that there has been a decrease in mammals, it is also often assumed that the average zoo holds less mammal species compared to 2000. It makes sense to think that if individual zoos hold less species than before, there are also less species than before overall and if not that there are many more rarities now compared to 2000. This also seems to be a wrong assumption. I compared the listings from the International Zoo Yearbooks from 2003 (species data from 1998) with those from 2021 for some 220 European zoos. There actually seems to have been a slight net increase of mammal holdings on the continent in the past 25 years from 13.351 to 13.723 (+2.6%). This estimate is a conservative one as many zoos that are currently expanding at a high pace were tiny in 2000 and weren’t listed in the IZY back then and it is impossible to assess how many mammal species they did have at the time. So for zoos like Noah’s Ark Zoo Farm, Parc Animalier d’Auvergne or Parc Animalier de Sainte Croix, which each have sizable mammal collections now it is not possible to measure exactly how large their increase was. Another reason why the estimate is conservative is because some zoos have numbers listed for 1998, but not 2021. In those cases I have taken a quick Zootierliste search for all mammal taxa as a replacement. While this number includes possible doubling of subspecies, that is outweighed by ignoring domestics, which do seem to be included in the IZY numbers. Data in the IZY are of-course also not 100% accurate, I have the feeling certain zoos give higher numbers than they actually have/had, but that is as much the case for the 1998 as the 2021 data, so should overall not have an impact at the aggregated level.

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@Gavial The growth of many French zoos has meant that for carnivores, primates and ungulates holding capacity has increased overall in Europe, with exhibits such as this takin valley in the Auvergne

The main reason for this difference between data and perception is probably caused by which zoos have actually had a net loss in species, compared to the zoos that gained species. Overall 91 zoos in the survey had a decrease in mammal species held, compared to 120 with gains. But looking at the ones which have lost species, the ones with the biggest losses are also some of the most known. With Zoo Berlin, Tierpark Berlin, Antwerp, Marwell and Blijdorp as top-5 and other big names such as Artis Amsterdam, London, Wilhelma, Paris Zoo des Vincennes, Leipzig, Lisbon and Munich in the top-25 it is no surprise people think there has been a serious loss. The top-25 of zoos that have gained species is much more varied. It contains the nouveau riche like Pairi Daiza, Sosto and Beauval, but also more under the radar zoos like Beale, Osnabrueck, Opole and Monde Sauvage. But responsible for about half of the overall net gain is Zoo Plzen. While Zoo Plzen is now known as a rarity hunter Valhalla, that only started around the turn of the century, back in 1998 Zoo Plzen had only 48 mammal species. Currently it is the most mammal species rich zoo of them all. While overall the number of mammal holdings has slightly increased, the number of mammals at the most species rich zoos has decreased. While both Berlins had over 200 mammal species each in 1998, no zoo topped 170 in 2021. The number of zoos with more than 100 mammal species has also decreased from 19 to 11 this century. But the median zoo in 1998 held 47 species, compared to 51 species now. So big losses at the top are compensated by smaller gains across the board. Looking at a country level, e.g. Czechia and France have seen a large net gain, whereas Germany has seen a sizable net loss, whereas the United Kingdom is relatively stable. In the Netherlands losses in the 4 big zoos are compensated by the appearance of new zoos (Overloon & Gaiazoo) and gains in other zoos.

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@Green_mamba The nouveau riche like Pairi Daiza and many smaller zoos have compensated for species richness losses in the city zoos of old

In the next post we will explore which families & orders have made the largest gains and losses. Given some of the most notable losses have occurred in the most popular orders, this is probably another reason why many people expected a decrease in the number of mammal species held. But that is a story for another time.
 
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