I said Australia not Oceania, so the kiwi is out. Also didn't include the king penguin for either.
Australia
- Platypus
- Tasmanian Devil
- Common Wombat
- Koala
- Quokka
- Red Kangaroo
- Red-necked Wallaby
- Dingo
- Southern Cassowary
- Emu
- Little Penguin
- Saltwater Crocodile
- Spectacled Flying-fox
- Eastern Bluetongue Skink
- Eastern Brown Snake
- Common Death Adder
South America
- Giant Anteater
- Nine-banded Armadillo
- Capybara
- Colombian White-faced Capuchin
- White-faced Saki
- Bush Dog
- Maned Wolf
- Spectacled Bear
- Giant Otter
- Cougar
- Ocelot
- Jaguar
- Baird's Tapir
- Alpaca
- Llama
- Collared Peccary
- Greater Rhea
- American Flamingo
- Galapagos Giant Tortoise (could technically be excluded)
- Cuiver's Dwarf Caiman
- Spectacled Caiman
- Brown-throated Sloth
- Green Iguana
- Boa Constrictor
- Yellow Anaconda
- Golden Poison Frog
- Lehmann's Poison Frog
- Red-eyed Tree Frog
- Brazilian Salmon Pink Tarantula
- Goliath Birdeater
- Brazilian Wandering Spider
- Amazonian Giant Centipede
- Cloudless Sulphur
- Menelaus Blue Morpho
- Monarch
- Titan Beetle
So that's 12 habitat animals for Aus compared to 21 for SA - as I said it's nearly half. Meanwhile 36/16 is 2.3, so there are over twice as many animals from SA overall
EDIT: Forgot the otter lol