persian onager are sill reproducing but this species is in a very bad way in the region, held only by TWPZ and all descended from relatively few founders.
unfortunately, despite the endangered status of this gorgeous equid there simply isnt enough space or resources to maintain viable populations of onager, zebra and przewalski horse.
due to the low founder number and need for more spaces for the p. horse this species has been listed as phase out.
TWPZ is the one of 23 institutions worldwide to hold this species and with 9 animals WPZ's herd represents 6.5% of the total zoo herd of 139. Logistically, despite fewer quarantine restrictions (as onagers dont belong to the artiodactyl family) as the only holder in the Southern Hemisphere keeping this species viable 'down under' would recquire a far greater commitment from the regions zoos which would ultimately conflict with PMP for zebra and p. horse.
to give an idea of the status of this species in Australia...
in 1979 TWPZ started displaying Onager with two stallions and two mares. In 1982 new blood in the way of an additional stallion and two mares were introduced.
the latest foal (dec 07) was the first since 2001. However, he is not absolutely related to all the other herd members (1 Stallion, five mares, 2 geldings plus foal =9).
now, on to Asian Elephants. I dont think the introduction has gone as rosily as media releases would have had it, although obviously this would be a staged introduction and I think in the future we may see all 3 animals fully integrated. Im guessing that early squabbles for dominance between Burma and Gigi may have manifested into aggression as Burma does have that streak in her. Long term though she may settle in with them, after all, whilst she may have beat up on poor old Heman frequently she did live along time at Taronga with Ranee until she died in 1998.
Fingers crossed, either way, the contact she has with Arna and Gigi is better than her being by herself although it does go to show why the ZPB of NSW's much maligned decision to transfer Burma to TWPZ rather than integrate her with the new Thai elephants may have been reached.