I visited last year in the middle of the year so my recollection is not that great. This list is in no way complete, and only includes the mammals and roughly 3/4 of the birds.
@Toki could probably fill in the gaps and finish off the list for Herps and Birds.
Mammals:
Northern Giraffe (
Giraffa camelopardalis)
Malayan Tapir (
Tapirus indicus)
Dusky Pademelon (
Thylogale brunii)
Axis Deer (
Axis axis)
Javan Rusa (
Rusa timorensis)
Bawean Hog Deer (
Axis kuhlii)
African Lion (
Panthera leo)
Malayan Tiger (
Panthera tigris jacksoni)
Southeast African Cheetah (
Acinonyx jubatus jubatus)
King Cheetah (
Acinonyx jubatus rex)
Melanistic Leopard (
Panthera pardus)
Patagonian Mara (
Dolichotis patagonum)
Common Palm Civet (
Paradoxurus hermaphroditus)
Lesser Mousedeer (
Tragulus kanchil)
Greater Mousedeer (
Tragulus napu)
Banteng (
Bos javanicus)
Asian Water Buffalo (
Bubalus bubalis)
Ankole Watusi (
Bos taurus)
Malayan Elephant (
Elephas maximus hirsutus)
Binturong (
Arctictis binturong)
Puma (
Puma concolor)
Giant Panda (
Ailuropoda melanoleuca)
Dromedary Camel (
Camelus dromedarius)
Sumatran Orangutan (
Pongo abelii)
Common Chimpanzee (
Pan troglodytes)
Bornean Orangutan (
Pongo pygmaeus)
Sumatran Porcupine (
Hystrix sumatrae)
African Porcupine (
Hystrix africaeaustralis)
Serval (
Leptailurus serval)
Striped Hyena (
Hyaena hyaena)
Sable Antelope (
Hippotragus niger)
Red Lechwe (
Kobus leche)
Kafue Flats Lechwe (
Kobus leche kafuensis)
Southern White Rhinoceros (
Ceratotherium simum simum)
Lowland Nyala (
Tragelaphus angasii)
Red Muntjac (
Muntiacus muntjak)
Asiatic Black Bear (
Ursus thibetanus)
Grizzly Bear (
Ursus arctos)
Malayan Sun Bear (
Helarctos malayanus)
Indian Gaur (
Bos gaurus)
Barasingha (
Rucervus duvaucelii)
Malayan Porcupine (
Hystrix brachyura)
Greater Capybara (
Hydrochoerus hydrochaeris)
Oyen the domestic cat (
Felis catus)
Common Hippopotamus (
Hippopotamus amphibius)
Asian Small Clawed Otter (
Aonyx cinereus)
Lion Tailed Macaque (
Macaca silenus)
Common Raccoon (
Procyon lotor)
Common Marmoset (
Callithrix jacchus)
Siamang (
Symphalangus syndactylus)
Lar Gibbon (
Hylobates lar)
Black and White Ruffed Lemur (
Varecia variegata)
Ring Tailed Lemur (
Lemur catta)
You'll also find wild Long Tailed Macaques (
Macaca fascicularis), Silvery Thighed Langurs (
Presbytis siamensis), and Dusky Langurs (
Trachypithecus obscurus). The Silvery Thighed and Dusky Langurs hang out near the cassowary enclosure, the macaques near the Savanna exhibit.
Birds:
Emu (
Dromaius novaehollandiae)
Southern Cassowary (
Casuarius casuarius)
Painted Stork (
Mycteria leucocephala)
Milky Stork (
Mycteria cinerea)
Muscovy Duck (
Cairina moschata)
Common Shelduck (
Tadorna tadorna)
Indian Peafowl (
Pavo cristatus)
Malayan Rhinoceros Hornbill (
Buceros rhinoceros rhinoceros) 0.1
Wrinkled Hornbill (
Aceros corrugatus) 1.0
White Crowned Hornbill (
Berenicornis comatus) 0.1
Great Hornbill (
Buceros bicornis) 1.1
Common Curassow (
Crax rubra)
Golden Pheasant (
Chrysolophus pictus)
Malay Crestless Fireback (
Lophura erythrophthalma)
Silver Pheasant (
Lophura nycthemera)
Great Argus (
Argusianus argus)
African Egret (
Ardea alba)
African Spoonbill (
Platalea alba)
Mountain Peacock Pheasant (
Polyplectron inopinatum)
Nicobar Crown Pigeon (
Caloenas nicobarica)
Pink Necked Green Pigeon (
Treron vernans)
Storm’s Stork (
Ciconia stormi)
Mandarin Duck (
Aix galericulata)
White Bellied Sea Eagle (
Haliaeetus leucogaster)
Himalayan Griffon Vulture (
Gyps himalayensis)
Most birds are in the aviary area, which is quite dark, far darker than the Winged Sanctuary in Singapore. There are large moats in front of the aviary so you'll have to stand there awkwardly to put the lens up to the wire mesh. Good luck with the photographing them.