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In the remote groups! Hey bc 
We have a couple of iconic black avians; the swan and the cockatoo.
At some point along the Indonesian archipelago, the Australian plate subducts rapidly and seems to create an above water (as well as a below ground) boundary. This has been called the Wallace line and it demarcates the Indonesian life forms from the Australiasian.
Examples: Australasia has no large carnivorous mammals - no bears, cougars etc. We have big lizards.
We have around 90% of the world's poisonous snakes.
I'm still learning about the Wallace Line.
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