IUCN Red List changes and common zoo animals

Dassie rat said:
I'm confused about this. The Hispaniolan solenodon is one of those species that is rarely seen and LC seems a very optimistic assessment, especially as some 'critically endangered' species have populations of tens of thousands.
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There are certainly species with still pretty high populations assessed as CR - such as the hamster discussed here, or European Eel - in these cases my understanding is it's because the rate of change of the population is so high that action is needed.

For what it's worth, this is the justification for the solenodon:

This species is assessed as Least Concern because it has a large extent of occurrence (EOO) of approximately 80,493 km² and is found in numerous protected areas. Whilst there is ongoing habitat destruction and degradation across several parts of its range, there is no evidence of recent subpopulation declines or extirpations. It may qualify as threatened in the future if further data show that habitat loss or predation by invasive mammals are significant threats.
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Solenodon paradoxus (Hispaniolan Solenodon) (iucnredlist.org)
 
Onychorhynchus coronatus said:
Zoos at least as far as I can see should be the last resort, to use a metaphor rather like the intensive care units, for severely threatened species.
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Unlike intensive care units, it is usually impossible to begin a zoo breeding program when the species is very rare. Because of not risking taking few precious individuals, bureaucracy etc. For large mammals it is practically impossible. There are some cases with small mammals, smaller birds, reptiles, amphibians and freshwater fish.

So almost all endangered species in zoos were brought to zoos when the species was much commoner.

I was also pointing that species situation changes within years, but organizing a conservation program usually takes much longer. Both in zoos and in the wild.
 
birdsandbats said:
Regarding common species under threat, the Common Grackle, an extremely common species where I live, has suffered huge declines in recent decades. Right now it is one of the most common bird species, but if the trends continue they may become threatened in just a few decades.
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Listed as NT now, the declines have been noted.

Maguari said:
Good to see Ziphiidae has been better assessed now, though.
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Data deficient is being worked out; Amazon River Dolphin moves from DD to EN, both pilot whales now LC. Some good results and many concerning ones.
 
Maguari said:
Fortunately, a few already are. From what I know it definitely seems a good candidate for breed-and-release if suitable sites exist.
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Hamster re-introductions are already taking place in the Netherlands and Germany, which is basically the edge of their natural range. These projects are successful, if managed well. It just seems to underscore that grassland habitats are often overlooked as highly relevant for conservation, with public focus only on forest.... Despite that grasslands and other open habitats, especially in Europe harbour more biodiversity and healthy grassland ecosystems store a lot of soil carbon...
 
It looks like the IUCN can't quite make up its mind on the Sunda pig-tailed macaque - it was moved from Vulnerable to Endangered in the previous update (July, I think) and in this most recent one has been moved back down to Vulnerable again.

Also noticed that both species of white-throated capuchin have been moved up into the Vulnerable category as well. Speaking of which, does anyone know which species is kept in European zoos or are they hybrids between the two?
 
Of course, no word on lesser-known endangered inverts. :(
Do realize that some of these lesser-known endangered inverts could already be extinct by now, they're little studied and have hardly anything known about them other than they are endangered.
 
Jurek7 said:
Unlike intensive care units, it is usually impossible to begin a zoo breeding program when the species is very rare. Because of not risking taking few precious individuals, bureaucracy etc. For large mammals it is practically impossible. There are some cases with small mammals, smaller birds, reptiles, amphibians and freshwater fish.

So almost all endangered species in zoos were brought to zoos when the species was much commoner.

I was also pointing that species situation changes within years, but organizing a conservation program usually takes much longer. Both in zoos and in the wild.
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Yes, am very aware that organizing a conservation program takes longer both ex-situ and in-situ.

I wasn't really thinking about large mammals but rather the smaller taxa which as you state has been taken into captivity by zoos as a last resort in many conservation interventions the majority of which have been successful.
 
Dassie rat said:
I'm confused about this. The Hispaniolan solenodon is one of those species that is rarely seen and LC seems a very optimistic assessment, especially as some 'critically endangered' species have populations of tens of thousands. There is a species of opossum that is known from 6 specimens, but is assessed as LC. I would have thought that the lowest it could be was Data Deficient.
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There was a study by ZSL Edge that concluded that the species was present across the majority of the island in both the DR and Haiti. This was including within very anthropized habitat and that it was much more common than previously thought.

The Hispaniolan hutia from what I remember reading seems to be far more sensitive to anthropogenic stressors.

The Cuban solenodon on the other hand does seem to be far more vulnerable than its close relative but I think they are still gathering the necessary baseline data on that particular species as there is a real paucity of information about its status.
 
One rather alarming thing I have just noticed from the update is that the sunflower seastar Pycnopodia helianthoides has joined the list as Critically Endangered. Mostly as the result of sea star wasting syndrome, but also climate change and fishing.

The IUCN Red List page for the species does seem to suggest that captive breeding and rearing is the most viable recovery option for many areas. It seems that captive rearing has already proved feasible and has the potential for cost-effective high production of young seastars on a relatively quick timescale.
 
One thing about the update which I find super alarming is the case of Chitala lopis, which seems to have dropped from Least Concern, to becoming Extinct, reason being it not being seen for over 160 years despite extensive sampling, which leads me to question the fact why it was considered Least Concern.
 
the racoon has spoken said:
One thing about the update which I find super alarming is the case of Chitala lopis, which seems to have dropped from Least Concern, to becoming Extinct, reason being it not being seen for over 160 years despite extensive sampling, which leads me to question the fact why it was considered Least Concern.
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That seems odd given that there are decent color photos available, and even photos of them in aquaria.
 
Great Argus said:
That seems odd given that there are decent color photos available, and even photos of them in aquaria.
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On IUCN its listed as extinct, but I have also found multiple color photos of them. Of course, theres always the possibility that those aren't actually depicting Chitala lopis, which I find Very likely. But its so scary to think that not all extinctions are gradual, some go from least concern to extinct very quickly. :(
 
"C. lopis" was a species complex found throughout southeast Asia, hence the previous treatment of LC (and hence the photos of live and caught fish on the internet). The "true" C. lopis is now considered to be an endemic Javanese species, which is most probably extinct.
 
Chlidonias said:
"C. lopis" was a species complex found throughout southeast Asia, hence the previous treatment of LC (and hence the photos of live and caught fish on the internet). The "true" C. lopis is now considered to be an endemic Javanese species, which is most probably extinct.
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Thank you for the Clarification, that definitely clears things up @Chlidonias! :)
 
Shocked to learn that bonnet macaques are now considered Vulnerable. Such seeming abundance even in Indian cities.
 
Why is crab-eating macaque Vulnerable now? I’ve seen it in both cities and islands with no people, and it is also an invasive species outside its range.
 
RatioTile said:
Why is crab-eating macaque Vulnerable now? I’ve seen it in both cities and islands with no people, and it is also an invasive species outside its range.
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IUCN usually doesn't account for species outside their range. The European rabbit is classified as Endangered despite doing well outside its native range in many places.
 
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