One Year Update (Part One)
Just over a year ago, I made this thread for the purpose of analysing populations of species held in small numbers (10 individuals or less) and their future in the region.
Here is an update on how these assessments are tracking, beginning with species whose regional population was predicted to increase:
Part One - Regional population predicted to increase:
Regional population predicted to increase:
Indian rhinoceros (Rhinoceros unicornis) 2.1 at Dubbo
Black rhinoceros (Diceros bicornis) 4.4 at Dubbo; 2.0 at Monarto
Common hippopotamus (Hippopotamus amphibius) 1.4 at Dubbo; 0.5 at Werribee
Pygmy hippopotamus (Hexaprotodon liberiensis) 1.0 at Adelaide; 0.1 at Darling Downs; 1.0 at Melbourne; 1.1 at Taronga
Brazilian tapir (Tapirus terrestris) 1.2 at Adelaide; 0.1 at Darling Downs
Bornean orangutan (Pongo pygmaeus) 2.1 at Auckland Zoo
Mandrill (Mandrillus sphinx) 2.1 at Adelaide; 0.1 at Tasmania
Snow leopard (Panthera uncia) 2.1 at Billabong; 1.4 at Melbourne; 0.1 at Mogo
Sri Lankan leopard (Panthera pardus kotiya) 3.1 at Canberra; 2.2 at Darling Downs
Clouded leopard (Neofelis nebulosa) 2.2 at WCCC
Fishing cat (Prionailurus viverrinus) 1.1 at Taronga; 1.0 at WCCC; 1.2 at Hamilton
Indian rhinoceros:
A year on, I would now place this species in the uncertain category. Though I believe they have a future at Dubbo, I no longer have hope of other facilities acquiring this species any time soon. All the information we’ve received suggests Auckland, Melbourne and Perth will not be replacing their elephants with Indian rhinoceros and they don’t feature in the masterplans for Werribee and Monarto.
Black rhinoceros:
The black rhinoceros population has shown a slight increase following the birth of a male calf at Dubbo. This takes the regional population to 7.4 individuals and with a total of 11, the black rhinoceros no longer qualifies for the 10 or less criteria.
Long term, I anticipate minor increases (possibly into the mid-teens); though importing additional founders is clearly a challenge and both Dubbo and Monarto have a range of other projects taking priority.
Common hippopotamus:
I remain confident the regional population will increase long term. The Hippopotamus IRA is in progress and Monarto will soon become the third holder of this species. It’s unclear whether Kani will breed (at Dubbo or anywhere), but it’s a possibility the region will be able to import from overseas within the next few years.
Pygmy hippopotamus:
Same as above re. imports. Taronga have reintroduced their pair for breeding in the meantime, so hopefully they’ll be a new calf in 2024.
Brazilian tapir:
I’m leaning towards placing this in the unclear category as it’s currently unknown whether imports from overseas will occur. There’s a range of challenges involved in sourcing them and there’s not enough information available to us at this stage to comment on the likelihood.
Bornean orangutan:
I was delighted to see Auckland Zoo undertake an import of a female Bornean orangutan this year. It’s a clear statement of Auckland’s long term intention to build up a colony of this species. I look forward to hearing of births in due course; though I believe Auckland Zoo will remain the only regional holder for the foreseeable.
Mandrill:
Sadly, this species can now be moved to the ‘phase out’ category. Adelaide’s revised masterplan will see this species phased out; which combined with Tasmania Zoo holding an elderly female and a lack of interest from other holders, is a clear indication this species is set to disappear from the region.
Snow leopard:
We’ve lost a holder (Mogo); but gained two more (Tasmania and Wellington). I remain confident the regional population will increase, with Tasmania Zoo planning to import a female and Melbourne Zoo planning to breed again. Whether Billabong will receive surplus young Snow leopards upon the passing of their elderly cats remains to be seen.
Sri Lankan leopard:
The future of this species in the region continue to look positive with the announcement of the third and fourth litters. The regional population totals 10 cats (including six under the age of three years) and there’s potential for a third breeding pair to be created from first generation offspring.
Clouded leopard:
Hamilton Zoo are still planning to acquire this species, so despite no breeding from the cats at the WCCC to date, I remain optimistic the regional population will continue to increase. Long term, additional holders may come onboard.
Fishing cat:
This is another species I’d now relegate to the ‘unclear’ category. Breeding at Hamilton seems unlikely and it wouldn’t surprise me to see both Hamilton and Taronga phase them out long term.