I was curious about exotic rarities in Australia, so I put together this list of zoos that are single holders of a species or subspecies. (Some of these species are also kept in private collections, or are feral, but for the purposes of this I’ve included them because these places are where they are accessible for the general public.)
Melbourne Zoo (12):
Collared Peccary, Mississippi Map Turtle, Spiny Terrapin, Painted Wood Turtle, Horsfield's Tortoise, Twist-necked Turtle, Rainbow Boa, Kenyan Sand Boa, California King Snake, Honduran Milk Snake, Pueblan Milk Snake, Cantil
Taronga Zoo (8):
Fishing Cat, Barton’s Long-beaked Echidna, Andean Condor, Tuatara, Eastern River Cooter, Ornate Box Turtle, Chaco Tortoise, Solomon Islands Boa
Ballarat Wildlife Park (6):
Common Snapping Turtle, Yellow-footed Tortoise, Burmese Brown Tortoise, Siamese Cobra, Mozambique Spitting Cobra, Uracoan Rattlesnake
Adelaide Zoo (4):
Dusky Langur, Giant Panda, Amazon Tree Boa, Aruba Rattlesnake
Australian Reptile Park (2):
Solomon Islands Gecko, Argentine Black and White Tegu
Gorge Wildlife Park (2):
Greater Rhea, Paradise Shelduck
Perth Zoo (2):
Sunda Slow Loris, Three-toed Box Turtle
Sea World (2):
Polar Bear, Pacific Habour Seal
Taronga Western Plains Zoo (2):
Persian Onager, Indian Rhinoceros
Australia Zoo (1):
Splash-backed Poison-Arrow Frog
Crocodylus Park (1):
Malayan Box Turtle
Darling Downs Zoo (1):
Yellow Anaconda
Halls Gap Zoo (1):
Mute Swan
Mansfield Zoo (1):
Sambar
Monarto Safari Park (1):
Persian Fallow Deer
National Zoo (1):
Sri Lankan Leopard
Rockhampton Zoo (1):
Lion-tailed Macaque
Tasmania Zoo (1):
Sulawesi Black Macaque
Werribee Zoo (1):
Vervet
Wild Cat Conservation Centre (1):
Mainland Clouded Leopard
Melbourne Zoo (12):
Collared Peccary, Mississippi Map Turtle, Spiny Terrapin, Painted Wood Turtle, Horsfield's Tortoise, Twist-necked Turtle, Rainbow Boa, Kenyan Sand Boa, California King Snake, Honduran Milk Snake, Pueblan Milk Snake, Cantil
Taronga Zoo (8):
Fishing Cat, Barton’s Long-beaked Echidna, Andean Condor, Tuatara, Eastern River Cooter, Ornate Box Turtle, Chaco Tortoise, Solomon Islands Boa
Ballarat Wildlife Park (6):
Common Snapping Turtle, Yellow-footed Tortoise, Burmese Brown Tortoise, Siamese Cobra, Mozambique Spitting Cobra, Uracoan Rattlesnake
Adelaide Zoo (4):
Dusky Langur, Giant Panda, Amazon Tree Boa, Aruba Rattlesnake
Australian Reptile Park (2):
Solomon Islands Gecko, Argentine Black and White Tegu
Gorge Wildlife Park (2):
Greater Rhea, Paradise Shelduck
Perth Zoo (2):
Sunda Slow Loris, Three-toed Box Turtle
Sea World (2):
Polar Bear, Pacific Habour Seal
Taronga Western Plains Zoo (2):
Persian Onager, Indian Rhinoceros
Australia Zoo (1):
Splash-backed Poison-Arrow Frog
Crocodylus Park (1):
Malayan Box Turtle
Darling Downs Zoo (1):
Yellow Anaconda
Halls Gap Zoo (1):
Mute Swan
Mansfield Zoo (1):
Sambar
Monarto Safari Park (1):
Persian Fallow Deer
National Zoo (1):
Sri Lankan Leopard
Rockhampton Zoo (1):
Lion-tailed Macaque
Tasmania Zoo (1):
Sulawesi Black Macaque
Werribee Zoo (1):
Vervet
Wild Cat Conservation Centre (1):
Mainland Clouded Leopard