Trends in European zoo collections in the 21st century

I completely agree with you, but I have seen plenty of common hippos in the wild in pools/puddles that make Stuttgart/Frankfurt/Artis/Kronberg/Leipzig look spacious. Many pods in the wild also seem to consist of only 2-4 individuals, but that seems more limited by available water than what they actually want. In a way these small enclosures and small groups fit what is going on in the wild (though at night they can of-course roam much further).

Displaying hippos optimally in areas with proper winters is really though and I haven't seen a single indoor enclosure for them yet with appropriate amounts of land area...
Nature is brutal and there is disease, predators, extreme weather etc... But we all recognize that those things are not acceptable to enclosed animals under our care. If you dig into the literature you will see that according to the rain availability the wild hippo populations have huge fluctuations and in some years you have hundreds or thousands of animals dying. So those conditions are far from optimal even for wild hippos. But they also breed fast and populations regrow quickly.
 
Number of zoos kept (current and former during the holding period):
A 1 zoo
B 2-5 zoos
C 6-10 zoos
D >10 zoos

Time period kept:
1 < 1 year
2 1-5 years
3 6-10 years
4 11-20 years
5 > 20 years

* Species successfully bred
♱ Dead end (in case of species gained)
↑ Species gaining popularity (in case of species gained)

Today we will cover two small deer-like families before we move to the 2 largest even-toed ungulate families.

Chevrotains - Tragulidae
# Species kept 1-1-2000: 1
# Species kept currently: 2 (+1)
# Species gained: 1
# Species lost: -


The species status of the only species of chevrotain, also known as mouse-deer or kanchil, that has been kept continuously in Europe is still in doubt. Back in the day it was listed as lesser chevrotain (Tragulus javanicus), but since that species was split, their status is unclear. It is clear that the animals are not pure Tragulus javanicus s.s., and to me it seems most likely the animals are simply Tragulus kanchil, the Lesser Indo-Malayan chevrotain. At least part, if not all, of the European population can be traced back to T. kanchil imports.

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@Giant Eland A true Javan chevrotain in Java

Species gained

Balabac chevrotain - Tragulus nigricans B4*
The RSCC imported 8 animals via Zoo Wroclaw in 2008 and it was good that 2 animals remained in Wroclaw, as of the 6 animals that arrived at the RSCC, 5 died quickly. Fortunately breeding this species didn’t prove too difficult, the problem is that most animals born are female. The birth of a male in Wroclaw in 2022 (making it the 3rd male in the population) gives some hope that this fragile population can be expanded again and maintained long term in Europe. But with only around 13 animals on the whole continent that will be a challenge.

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@Kaelio Philippine animals are seeing increasing appreciation in Europe this century

Species losing popularity

Lesser Indo-Malayan chevrotain - Tragulus kanchil
These sabre-toothed “agouti” have been around for many decades, but this century the species is slowly becoming rarer. It doesn’t seem to suffer from the rare presence of Balabac chevrotain, I just get the impression that the birth rates are slightly too low, but not sure if that is true.

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@Zooish If you want to be sure you see pure Tragulus kanchil in an EAZA zoo, you have to visit Singapore


Musk deer - Moschidae
# Species kept 1-1-2000: 1
# Species kept currently: 1
# Species gained: -
# Species lost: -


That this family is kept in Europe at all is solely thanks to Zoo Leipzig, which has kept Siberian musk deer (Moschus moschiferus) since 1980 and where over 100 musk deer were born since then. Other zoos currently hold animals born in Leipzig, but successful breeding outside Leipzig is very rare, so the future probably still rests with a single zoo for the foreseeable future, which is not a great sign for such a fragile species. The current population is around 12 animals, of which the majority lives in Leipzig, which still breeds them yearly.

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@Zooreviewsuk While the musk deer situation in Europe is precarious, it is much better compared to the US

Progress
21/22 orders completed
100/106 families completed
528-537 species present in 2000
546-549 species present in 2023
221-232 species gained this century
212-216 species lost this century
 
Anyone is aware why Leipzig is so successful with musk deer and all other zoos apparently fail to maintain them properly. I know that lastly other zoos have mainly hold surplus individuals that go back and forth to Leipzig but there had been other groups in breeding situation earlier that did not go well.
Other question, any news about the import of the few last American animals to Europe? I remember it was a project from the Tag report I think.
 
Anyone is aware why Leipzig is so successful with musk deer and all other zoos apparently fail to maintain them properly. I know that lastly other zoos have mainly hold surplus individuals that go back and forth to Leipzig but there had been other groups in breeding situation earlier that did not go well.
Other question, any news about the import of the few last American animals to Europe? I remember it was a project from the Tag report I think.

Most zoos just received surplus males, but in the case of Tierpark Berlin, which also has (and had) females and has bred it, is neglect. Apparently the refusal to put a net over the enclosure cost the life of at least one baby musk deer, because it was killed/harassed by an abundance of hooded crows. There was some more info on Zoofreunde about this, so will look it up later.

I'm shocked Europe doesn't have Tragulus napu! That's a species rapidly gaining popularity over on this side of the Atlantic.

There are some in Russia, but not in the rest of Europe since about 100 years according to Zootierliste. When it comes to antelope there are a fair few species that have been absent a long time in Europe, but that are around in the US
 
Most zoos just received surplus males, but in the case of Tierpark Berlin, which also has (and had) females and has bred it, is neglect. Apparently the refusal to put a net over the enclosure cost the life of at least one baby musk deer, because it was killed/harassed by an abundance of hooded crows. There was some more info on Zoofreunde about this, so will look it up later.

Leipzig doesn't have net over the main exhibit, either. Are they breeding the species in off limits area?
 
Leipzig doesn't have net over the main exhibit, either. Are they breeding the species in off limits area?

Leipzig's musk deer exhibit is much more in the forest and there aren't as many hooded crows in Zoo Leipzig anyway as compared to Berlin from what I remember. Berlin als has had some bad luck with a female dying while giving birth and a male musk deer that attacked a female...

It will be interesting if the breeding in Leipzig can be maintained if the new musk deer enclosure from the Masterplan in the centre of the zoo ever materializes and they will move out of their proven forest enclosures....
 
It will be interesting if the breeding in Leipzig can be maintained if the new musk deer enclosure from the Masterplan in the centre of the zoo ever materializes and they will move out of their proven forest enclosures....

Personally, i fear the worst.
 
Other question, any news about the import of the few last American animals to Europe? I remember it was a project from the Tag report I think.
I imagine that that ship has sailed. COVID delayed the project, and the numbers in North America plummeted in the meantime. There are only 3.1 animals left, and 1.0 of which is certainly too old to move. With how fragile these animals have proven to with just regular husbandry and moves within North America, I highly doubt any of the remaining animals would survive the trip to Europe.
 
Giraffe and mousedeer in zoos question the sense of splitting subspecies into several similar species. Not only these subspecies perfectly interbreed in zoos, but Vincennes Zoo kept one form of giraffes for many decades, without anybody noticing they were a 'different species'.

Possibly fake splitting subspecies into species is a good way to force conservationists to protect separate subspecies, as it was done throughout the most of 20. century. But it is an oddly circular way.

About musk deer - I hope some zoo gives them possibility to climb. As shown in Handbook of the Mammals of the World, musk deer can use their side hooves to climb branches like goats in Morocco.
 
Not only these subspecies perfectly interbreed in zoos, but Vincennes Zoo kept one form of giraffes for many decades, without anybody noticing they were a 'different species'.

Your argument is somewhat undermined by the fact that Kordofan Giraffe (their actual identity) and West African Giraffe (their assumed identity) are *still* classified as the same species - so using the Vincennes animals as evidence against the recent splits is entirely erroneous!

As for your suggestion that the splits are actually some kind of deliberately fraudulent subterfuge to "force conservationists to protect separate subspecies", I think @DavidBrown might have a thing or two to say about that :p
 
Giraffe and mousedeer in zoos question the sense of splitting subspecies into several similar species. Not only these subspecies perfectly interbreed in zoos, but Vincennes Zoo kept one form of giraffes for many decades, without anybody noticing they were a 'different species'.

Do you have any evidence to back up these claims?

Groves & Meijaard found morphological differences between Javan & lesser chevrotain and based on their mitogenome they were estimated to have diverged 2.5 million years ago (https://www.sciencedirect.com/science/article/pii/S1055790318302720), which is a similar difference as between e.g. eland & giant eland.

Giraffe taxonomy has been discussed in quite some detail recently already: Favourite Giraffe Species
 
I really don't understand the quite obsessive disdain/distrust (sometimes almost conspiracy theory-like) that many zoo chatters have towards taxonomy/taxonomists. Most zoo chatters do not even understand many of the tools or approaches used by taxonomists nowadays, but still have fervent opinions about what is right or wrong taxonomy wise. For example, many people around seem to not understand/accept the role that genetics and genomics play nowadays in taxonomy.
Just to say, taxonomists do not care about whatever animals zoos have. Neither they are the devil trying to mess up with zoochatters' "stamp collections". I mean, just take a look to the discussion that @lintworm shared about giraffe taxonomy. It's quite the same phenomenon I observe within the birdwatching community.
Taxonomists study wild populations, not zoo collections, because it is in the wild where the process of speciation occurs. They work with science and science is not monolithic.
Zoos have to follow the evidence of the taxonomists, not the other way around.
 
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Deer - Cervidae
# Species kept 1-1-2000: 28
# Species kept currently: 26 (-2)
# Species gained: -
# Species lost: 2


According to the average zoo visitor these are the most recognizable “boring” zoo inhabitants, often getting little love except when they can be fed or when fed on. Regardless, the European deer are commonly kept, most often in smaller zoos and there is quite a bit of variety of other species around too. There has been a clear trend towards endangered Asian deer, though not all Asian deer have profited. While no new species have appeared this century, 2 new subspecies appeared: moose (Alces alces americanus) in 2003 in Dierenpark Emmen and Barbary red deer (Cervus elaphus barbarus) in 2010 in Tierpark Berlin. Both taxa were imported from North America and were not made for any long-term presence. The final moose died in 2022 and only 3 females are left of the barbary red deer since the male died in 2021.

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@Patrick87 With the passing of the only male Barbary red deer in Europe in 2021, this subspecies will die out again

Species lost

Marsh deer - Blastocerus dichotomus B5*
This species was first kept around 1970 in the Wildfreigehege Hellenthal in Germany and bred there. From there both Zoo Krefeld and Zoo Berlin acquired animals and Zoo Krefeld kept the species until the late 1990s. Zoo Berlin established a small breeding group that was successfully kept for decades but slowly died out in the 1990s. The final animal died of old age in 2009.

Pampas deer - Ozotoceros bezoarticus B5*
It is a bit repetitive but this species was long kept and bred in Zoo Berlin. All animals in Europe kept after the WW2 derive from 1.2 animals imported from Paraguay in 1974 and 1977. Both Zoo Krefeld and Tiergarten Nuernberg received offspring from Berlin in the 1970s but the species didn’t breed there. The final animal in Berlin died in 2003.

full

@Tim May A female marsh deer of the now deceased Zoo Berlin breeding group

Species gaining popularity

Tufted deer - Elaphodus cephalophus
These small deer will likely be the ultimate Reeves’ muntjac replacement once the latter slowly dies out because it’s breeding is banned under EU law. The current history of tufted deer started in 1992 when Diergaarde Blijdorp received animals from Shanghai Zoo. Together with an import by Tierpark Berlin from San Diego in 1997 that was the start of this species in Europe. The number of holders has increased from 3 in 2000 to 15 in 2023 (with a stronghold in Germany) and this number is only expected to increase.

Reindeer - Rangifer tarandus
The domestic variety of reindeer has long been a zoo staple, but true wild reindeer were hard to find. This has changed with the rise of the Eurasian forest reindeer (ssp. fennicus) which had been kept in Scandinavia for decades. In the early years of the century only Tierpark Bern and Burgers’ Zoo kept this species outside of Scandinavia, but that has changed now. An increasing number of zoos have now replaced the domestic variety with their wild counterparts

Hog deer - Axis porcinus
In recent years the endangered Asian deer have received something of a reappraisal. An increase in mixed species exhibits and the establishment of breeding programs will have aided hog deer. Hog deer can be mixed with rhinos and a whole mix of other species, so they make an easy addition.

Persian fallow deer - Dama mesopotamica
As the critically endangered cousin of Europe’s most widely held mammal it is in a good position to attract the attention of zoos that want to move away from the most commonly held species. It is still quite an uncommon species though, as there is plenty of competition to fill the endangered Asian deer slot.

Visayan spotted deer - Rusa alfredi
The current European zoo population is descended from a 1990 import by Zoo Mulhouse. At the start of the century this was still a huge rarity with only a handful of holders. With about 30 holders at the moment this is still an uncommon species, but one that is well established in Europe.

White-lipped deer- Cervus albirostris
The European history of this species started in 1990 when Tierpark Berlin and Diergaarde Blijdorp started with this species, Rotterdam also imported animals further in the 1990s. By 2000 there were 3 holders and while this species is still quite uncommon the current number of 14 holders mean that the number of holders has increased nearly fivefold.

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@Bubalus Like the other 1990s deer arrivals, Visayan spotted deer are on the rise in Europe

Species losing popularity

Reeves’s muntjac - Muntiacus reevesi
Although it is currently the most common non-European deer in Europe, the number of holdings is set to decline given it is now listed as an invasive species under the current EU legislation, banning the breeding of this species. But German zoos seem to be exempted as breeding is still regular there (or at least pretend they are). This species is often signed as Muntiacus muntjak despite clearly not being that species. It could be a tactic for rogue zoos to continue with this species as long as law enforcement remains asleep or without knowledge…

Axis deer - Axis axis
With the rising popularity of a number of endangered Asian deer species, it is no surprise that the most commonly kept species is decreasing in numbers, though still being very common. That status will probably change as it was included on the latest EU invasives list, whereas it isn’t an invasive species in Europe. In the EU there has been a small population on the Brijuni Island in Croatia since 1911, but nothing more substantial, it is considered invasive in other areas such as Argentina though. Nevertheless a risk assessment found the risk high enough so that it is now banned. If anyone would want to ban hog deer or sambar next, there is probably a good chance they would end up in a follow-up of this legislation, given the current selection criteria.

Pere David's deer - Elaphurus davidianus
Seeing an extinct in the wild species losing popularity might seem surprising, especially as it is one of the poster boys of species saved by zoos. It isn’t exactly extinct in the wild anymore with 1000s of animals living in (semi-)freedom in China. A larger issue is probably the result of inbreeding, with all animals descending from 1.2 kept in Zoo Berlin. From what I have heard that is causing problems with high calf mortality in zoos, though a Chinese study found no relationship between calf mortality and genetic diversity in the deer’s re-introduced populations.

Southern pudu - Pudu puda
Despite being a small species, being near threatened and part of a breeding program since a long time, the number of pudu holders has decreased by almost 1/3 this century. Small ungulates in general have a tough time these days, but being South-American isn't an asset either if you are a deer these days.

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@vogelcommando Reeves's muntjac will become rarities in the foreseeable future

Dead ends

Grey brocket deer - Mazama gouazoubira
This species was kept and bred in Zoo Berlin from 1962-2009 when the final old animal died. Around 2009 Faunia, Madrid, imported a pair of this species from South America and there was regular breeding, but no population was established and the final animal was kept until 2022, at least when you believe Zootierliste. Photographic evidence on Facebook shows the final animal was still alive and kicking in 2023, somewhat extending the inevitable.

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@twilighter Not dead yet, the final grey brocket deer in Faunia is still clinging on

Progress
21/22 orders completed
101/106 families completed
556-565 species present in 2000
572-575 species present in 2023
221-232 species gained this century
214-218 species lost this century
 
and only 3 females are left of the barbary red deer since the male died in 2021.

Possibly only two now; certainly I only observed that many when I visited in September this year.
 
Deer - Cervidae
# Species kept 1-1-2000: 28
# Species kept currently: 26 (-2)
# Species gained: -
# Species lost: 2


According to the average zoo visitor these are the most recognizable “boring” zoo inhabitants, often getting little love except when they can be fed or when fed on. Regardless, the European deer are commonly kept, most often in smaller zoos and there is quite a bit of variety of other species around too. There has been a clear trend towards endangered Asian deer, though not all Asian deer have profited. While no new species have appeared this century, 2 new subspecies appeared: moose (Alces alces americanus) in 2003 in Dierenpark Emmen and Barbary red deer (Cervus elaphus barbarus) in 2010 in Tierpark Berlin. Both taxa were imported from North America and were not made for any long-term presence. The final moose died in 2022 and only 3 females are left of the barbary red deer since the male died in 2021.

full

@Patrick87 With the passing of the only male Barbary red deer in Europe in 2021, this subspecies will die out again

Species lost

Marsh deer - Blastocerus dichotomus B5*
This species was first kept around 1970 in the Wildfreigehege Hellenthal in Germany and bred there. From there both Zoo Krefeld and Zoo Berlin acquired animals and Zoo Krefeld kept the species until the late 1990s. Zoo Berlin established a small breeding group that was successfully kept for decades but slowly died out in the 1990s. The final animal died of old age in 2009.

Pampas deer - Ozotoceros bezoarticus B5*
It is a bit repetitive but this species was long kept and bred in Zoo Berlin. All animals in Europe kept after the WW2 derive from 1.2 animals imported from Paraguay in 1974 and 1977. Both Zoo Krefeld and Tiergarten Nuernberg received offspring from Berlin in the 1970s but the species didn’t breed there. The final animal in Berlin died in 2003.

full

@Tim May A female marsh deer of the now deceased Zoo Berlin breeding group

Species gaining popularity

Tufted deer - Elaphodus cephalophus
These small deer will likely be the ultimate Reeves’ muntjac replacement once the latter slowly dies out because it’s breeding is banned under EU law. The current history of tufted deer started in 1992 when Diergaarde Blijdorp received animals from Shanghai Zoo. Together with an import by Tierpark Berlin from San Diego in 1997 that was the start of this species in Europe. The number of holders has increased from 3 in 2000 to 15 in 2023 (with a stronghold in Germany) and this number is only expected to increase.

Reindeer - Rangifer tarandus
The domestic variety of reindeer has long been a zoo staple, but true wild reindeer were hard to find. This has changed with the rise of the Eurasian forest reindeer (ssp. fennicus) which had been kept in Scandinavia for decades. In the early years of the century only Tierpark Bern and Burgers’ Zoo kept this species outside of Scandinavia, but that has changed now. An increasing number of zoos have now replaced the domestic variety with their wild counterparts

Hog deer - Axis porcinus
In recent years the endangered Asian deer have received something of a reappraisal. An increase in mixed species exhibits and the establishment of breeding programs will have aided hog deer. Hog deer can be mixed with rhinos and a whole mix of other species, so they make an easy addition.

Persian fallow deer - Dama mesopotamica
As the critically endangered cousin of Europe’s most widely held mammal it is in a good position to attract the attention of zoos that want to move away from the most commonly held species. It is still quite an uncommon species though, as there is plenty of competition to fill the endangered Asian deer slot.

Visayan spotted deer - Rusa alfredi
The current European zoo population is descended from a 1990 import by Zoo Mulhouse. At the start of the century this was still a huge rarity with only a handful of holders. With about 30 holders at the moment this is still an uncommon species, but one that is well established in Europe.

White-lipped deer- Cervus albirostris
The European history of this species started in 1990 when Tierpark Berlin and Diergaarde Blijdorp started with this species, Rotterdam also imported animals further in the 1990s. By 2000 there were 3 holders and while this species is still quite uncommon the current number of 14 holders mean that the number of holders has increased nearly fivefold.

full

@Bubalus Like the other 1990s deer arrivals, Visayan spotted deer are on the rise in Europe

Species losing popularity

Reeves’s muntjac - Muntiacus reevesi
Although it is currently the most common non-European deer in Europe, the number of holdings is set to decline given it is now listed as an invasive species under the current EU legislation, banning the breeding of this species. But German zoos seem to be exempted as breeding is still regular there (or at least pretend they are). This species is often signed as Muntiacus muntjak despite clearly not being that species. It could be a tactic for rogue zoos to continue with this species as long as law enforcement remains asleep or without knowledge…

Axis deer - Axis axis
With the rising popularity of a number of endangered Asian deer species, it is no surprise that the most commonly kept species is decreasing in numbers, though still being very common. That status will probably change as it was included on the latest EU invasives list, whereas it isn’t an invasive species in Europe. In the EU there has been a small population on the Brijuni Island in Croatia since 1911, but nothing more substantial, it is considered invasive in other areas such as Argentina though. Nevertheless a risk assessment found the risk high enough so that it is now banned. If anyone would want to ban hog deer or sambar next, there is probably a good chance they would end up in a follow-up of this legislation, given the current selection criteria.

Pere David's deer - Elaphurus davidianus
Seeing an extinct in the wild species losing popularity might seem surprising, especially as it is one of the poster boys of species saved by zoos. It isn’t exactly extinct in the wild anymore with 1000s of animals living in (semi-)freedom in China. A larger issue is probably the result of inbreeding, with all animals descending from 1.2 kept in Zoo Berlin. From what I have heard that is causing problems with high calf mortality in zoos, though a Chinese study found no relationship between calf mortality and genetic diversity in the deer’s re-introduced populations.

Southern pudu - Pudu puda
Despite being a small species, being near threatened and part of a breeding program since a long time, the number of pudu holders has decreased by almost 1/3 this century. Small ungulates in general have a tough time these days, but being South-American isn't an asset either if you are a deer these days.

full

@vogelcommando Reeves's muntjac will become rarities in the foreseeable future

Dead ends

Grey brocket deer - Mazama gouazoubira
This species was kept and bred in Zoo Berlin from 1962-2009 when the final old animal died. Around 2009 Faunia, Madrid, imported a pair of this species from South America and there was regular breeding, but no population was established and the final animal was kept until 2022, at least when you believe Zootierliste. Photographic evidence on Facebook shows the final animal was still alive and kicking in 2023, somewhat extending the inevitable.

full

@twilighter Not dead yet, the final grey brocket deer in Faunia is still clinging on

Progress
21/22 orders completed
101/106 families completed
556-565 species present in 2000
572-575 species present in 2023
221-232 species gained this century
214-218 species lost this century
Re: Pere David's Deer, I was under the impression the population was descended from the herd at Woburn? Someone correct me if I am mistaken but I'm sure I've heard before that the entire population of the species can be traced back to there.
 
A larger issue is probably the result of inbreeding, with all animals descending from 1.2 kept in Zoo Berlin.
Re: Pere David's Deer, I was under the impression the population was descended from the herd at Woburn? Someone correct me if I am mistaken but I'm sure I've heard before that the entire population of the species can be traced back to there.
Indeed all Pere David's deer can be traced back to the Woburn herd but the only successful first-generation breeding animals in the Woburn herd came from Berlin Zoo. Hence, as "Lintworm" states, all Pere David's deer can be traced back to Berlin too.
 
Possibly only two now; certainly I only observed that many when I visited in September this year.
For what it is worth, ZIMS still lists 0.3; however, I do not know how reliable ZIMS data usually is for Berlin. There are 0.3 left in North America, as well. Our three females and the two original Berlin females are all from the same year's crop of offspring and are all approaching 19 years of age. This taxon will likely live on for awhile in Europe after the last animals in NA pass away, though, thanks to the 2016 birth.

Deer - Cervidae
# Species kept 1-1-2000: 28
# Species kept currently: 26 (-2)
# Species gained: -
# Species lost: 2


According to the average zoo visitor these are the most recognizable “boring” zoo inhabitants, often getting little love except when they can be fed or when fed on. Regardless, the European deer are commonly kept, most often in smaller zoos and there is quite a bit of variety of other species around too. There has been a clear trend towards endangered Asian deer, though not all Asian deer have profited. While no new species have appeared this century, 2 new subspecies appeared: moose (Alces alces americanus) in 2003 in Dierenpark Emmen and Barbary red deer (Cervus elaphus barbarus) in 2010 in Tierpark Berlin. Both taxa were imported from North America and were not made for any long-term presence. The final moose died in 2022 and only 3 females are left of the barbary red deer since the male died in 2021.

full

@Patrick87 With the passing of the only male Barbary red deer in Europe in 2021, this subspecies will die out again

Species lost

Marsh deer - Blastocerus dichotomus B5*
This species was first kept around 1970 in the Wildfreigehege Hellenthal in Germany and bred there. From there both Zoo Krefeld and Zoo Berlin acquired animals and Zoo Krefeld kept the species until the late 1990s. Zoo Berlin established a small breeding group that was successfully kept for decades but slowly died out in the 1990s. The final animal died of old age in 2009.

Pampas deer - Ozotoceros bezoarticus B5*
It is a bit repetitive but this species was long kept and bred in Zoo Berlin. All animals in Europe kept after the WW2 derive from 1.2 animals imported from Paraguay in 1974 and 1977. Both Zoo Krefeld and Tiergarten Nuernberg received offspring from Berlin in the 1970s but the species didn’t breed there. The final animal in Berlin died in 2003.

full

@Tim May A female marsh deer of the now deceased Zoo Berlin breeding group

Species gaining popularity

Tufted deer - Elaphodus cephalophus
These small deer will likely be the ultimate Reeves’ muntjac replacement once the latter slowly dies out because it’s breeding is banned under EU law. The current history of tufted deer started in 1992 when Diergaarde Blijdorp received animals from Shanghai Zoo. Together with an import by Tierpark Berlin from San Diego in 1997 that was the start of this species in Europe. The number of holders has increased from 3 in 2000 to 15 in 2023 (with a stronghold in Germany) and this number is only expected to increase.

Reindeer - Rangifer tarandus
The domestic variety of reindeer has long been a zoo staple, but true wild reindeer were hard to find. This has changed with the rise of the Eurasian forest reindeer (ssp. fennicus) which had been kept in Scandinavia for decades. In the early years of the century only Tierpark Bern and Burgers’ Zoo kept this species outside of Scandinavia, but that has changed now. An increasing number of zoos have now replaced the domestic variety with their wild counterparts

Hog deer - Axis porcinus
In recent years the endangered Asian deer have received something of a reappraisal. An increase in mixed species exhibits and the establishment of breeding programs will have aided hog deer. Hog deer can be mixed with rhinos and a whole mix of other species, so they make an easy addition.

Persian fallow deer - Dama mesopotamica
As the critically endangered cousin of Europe’s most widely held mammal it is in a good position to attract the attention of zoos that want to move away from the most commonly held species. It is still quite an uncommon species though, as there is plenty of competition to fill the endangered Asian deer slot.

Visayan spotted deer - Rusa alfredi
The current European zoo population is descended from a 1990 import by Zoo Mulhouse. At the start of the century this was still a huge rarity with only a handful of holders. With about 30 holders at the moment this is still an uncommon species, but one that is well established in Europe.

White-lipped deer- Cervus albirostris
The European history of this species started in 1990 when Tierpark Berlin and Diergaarde Blijdorp started with this species, Rotterdam also imported animals further in the 1990s. By 2000 there were 3 holders and while this species is still quite uncommon the current number of 14 holders mean that the number of holders has increased nearly fivefold.

full

@Bubalus Like the other 1990s deer arrivals, Visayan spotted deer are on the rise in Europe

Species losing popularity

Reeves’s muntjac - Muntiacus reevesi
Although it is currently the most common non-European deer in Europe, the number of holdings is set to decline given it is now listed as an invasive species under the current EU legislation, banning the breeding of this species. But German zoos seem to be exempted as breeding is still regular there (or at least pretend they are). This species is often signed as Muntiacus muntjak despite clearly not being that species. It could be a tactic for rogue zoos to continue with this species as long as law enforcement remains asleep or without knowledge…

Axis deer - Axis axis
With the rising popularity of a number of endangered Asian deer species, it is no surprise that the most commonly kept species is decreasing in numbers, though still being very common. That status will probably change as it was included on the latest EU invasives list, whereas it isn’t an invasive species in Europe. In the EU there has been a small population on the Brijuni Island in Croatia since 1911, but nothing more substantial, it is considered invasive in other areas such as Argentina though. Nevertheless a risk assessment found the risk high enough so that it is now banned. If anyone would want to ban hog deer or sambar next, there is probably a good chance they would end up in a follow-up of this legislation, given the current selection criteria.

Pere David's deer - Elaphurus davidianus
Seeing an extinct in the wild species losing popularity might seem surprising, especially as it is one of the poster boys of species saved by zoos. It isn’t exactly extinct in the wild anymore with 1000s of animals living in (semi-)freedom in China. A larger issue is probably the result of inbreeding, with all animals descending from 1.2 kept in Zoo Berlin. From what I have heard that is causing problems with high calf mortality in zoos, though a Chinese study found no relationship between calf mortality and genetic diversity in the deer’s re-introduced populations.

Southern pudu - Pudu puda
Despite being a small species, being near threatened and part of a breeding program since a long time, the number of pudu holders has decreased by almost 1/3 this century. Small ungulates in general have a tough time these days, but being South-American isn't an asset either if you are a deer these days.

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@vogelcommando Reeves's muntjac will become rarities in the foreseeable future

Dead ends

Grey brocket deer - Mazama gouazoubira
This species was kept and bred in Zoo Berlin from 1962-2009 when the final old animal died. Around 2009 Faunia, Madrid, imported a pair of this species from South America and there was regular breeding, but no population was established and the final animal was kept until 2022, at least when you believe Zootierliste. Photographic evidence on Facebook shows the final animal was still alive and kicking in 2023, somewhat extending the inevitable.

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@twilighter Not dead yet, the final grey brocket deer in Faunia is still clinging on

Progress
21/22 orders completed
101/106 families completed
556-565 species present in 2000
572-575 species present in 2023
221-232 species gained this century
214-218 species lost this century
Being a hoofstock afficionado on the other side of the pond, this is a particularly painful post :p What I would not give to see so many species gaining in popularity! Thanks to Chronic Wasting Disease regulations and an increasing lack of interest in hoofstock, we are hemorrhaging most deer species in our major collections -- fallow, axis, and generic sika, of course, are mainstays in smaller/private facilities, and some larger species persist in greater numbers in private safaris and ranches. The smaller taxa, like Reeve's muntjac, western tufted deer, and southern pudu, are not subject to the same regulations as the larger species, and luckily they have seen an increase in population and number of holders. Native species are likely to continue doing well as rescues and in native wildlife displays, but beyond Pere David's, we are looking to lose almost all other large exotic deer species in major zoos. Barasingha and Bactrian hangul are hanging on with the next greatest numbers and a few dedicated facilities, but without further interest, I am not sure how long they can be sustained. Attempts were made to promote interest in Burmese brow-antlered deer in the last decade; however, instead of an increase in population and holders, we have seen the exact opposite, and they are now on very thin ice. It is not a good time to be a Cervid fan in North America.
 
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