Classifying Regional Populations
I like this idea!
I’m thinking it could follow a variation of the IUCN Red List. This is what I’ve come up with:
Least Concern - Common across multiple zoos, easily able to be imported from outside the region. Examples include African lion and Common chimpanzee.
Vulnerable - Could go either way. Not held in high numbers and at risk of being phased out or dwindling further due to a lack of regional support. Examples include Sri Lankan leopard and Eastern bongo.
Endangered - Extremely low numbers, but able to be imported. Identified as phase out. Examples include Malayan sun bear and California sea lion.
Critically Endangered - Extremely low numbers and unable to be imported. Examples include Common hippopotamus, Greater flamingo and Andean condor.
Locally Extinct - Phased out but able to be re-imported. Examples include Siberian tiger and Leopard cat.
Functionally Extinct - Phased out and theoretically able to be re-imported, but practically speaking are unable to so. Examples include Jaguar and Temminck’s golden cat.
Extinct - Phased out and unable to be re-imported. Examples include Chilean flamingo and will soon include Collared peccary.
I really like this idea, obviously, we can't vote on it but maybe we can come to some sort of general consensus on where we think certain species sit. We could also add an indicator on every rating on where the population is currently traveling i.e. ↑
↓ or -
For example, both the Sri Lankan leopard and Eastern bongo could be ranked as 'vulnerable'. but Sri Lankan leopard numbers have been increasing in the region and look to continue to do so. So arguably you could put Sri Lankan leopards down as "Vulnerable↑". The up arrow ↑ indicates things are looking good for them. Whereas the Eastern Bongo population lacks any imports on the horizon and has stagnated reproductively so could be put down as "Vulnerable↓".
I just think it would be a really good system for people like me who aren't knowledgeable across all species. So a singular ranking will allow me to quickly ascertain where say our Red Pandas are. I know there are plenty of them, but is this an all-time low/high for this species in the region? Are their numbers currently increasing or decreasing? How's their genetic diversity? All of this could be considered when designating them a ranking.
Personally, for example, I'd rank some of these populations this way -
Asian elephant (Elephas maximus): Least Concern (-)
Numbers are currently stagnant, the births of Melbourne's next three calves will counteract the losses of our last three cows (Tricia, Saigon, and Burma (TWPZ)).
Sumatran elephant (Elephas maximus sumatranus): Endangered (↓)
Numbers are low, two cows are nearing the post-reproductive danger zone and a bull import is looking evermore unlikely.
White Rhinos (Ceratotherium simum): Least Concern (-)
Numbers are stagnant as we have had a few recent deaths 1.0 Stumpy and 1.0 Inkosi.
Black Rhinos (Diceros bicornis): Vulnerable (-)
This population is on the smaller side, although calves are still being born, without an import soon this population will suffer from stagnation and eventually decline.
Indian Rhinos (Rhinoceros unicornis): Endangered (↑)
Extremely low numbers, although breeding is occurring and interest has been expressed by additional zoos to hold this species.
Malayan Tapirs (Tapirus indicus): Critically Endangered (↓)
A region-wide phase-out is planned for this species. Destined to be regionally extinct in the next 15 years.
Brazilian Tapirs (Tapirus terrestris): Critically Endangered (-)
Numbers are extremely low and no breeding is occurring, however, zoos have expressed interest in continuing this species
Common Hippos (Hippopotamus amphibious): Critically Endangered (↑)
Numbers are extremely low, declining, and inbred. However, actions are being taken to counteract this by reigniting breeding, and imports are rumored.
Pygmy Hippos (Choeropsis liberiensis): Critically Endangered (-)
Numbers are extremely low, with one elderly breeding pair remaining, yet numbers are still declining and the population will be unable to continue without imports in the medium term.
Feel free to criticize these statements this is just an idea for a template

. I believe we should leave it up to the creators of each population index to decide where their species currently are.