As you’d expect from a collaboration, ground-up fantasy setting, the Shrouded Lands don’t seem to match the flora and fauna of any particular part of the world - and that’s for the best, of course. I wouldn’t sacrifice the Australasian drop bears and daggerfeet, Africna ostriches and hippos, or American beavers and mocking birds for the illusion of unity.
However, I really like that the Shrouded Lands are large enough and rich enough that we can ‘research’ them and draw interesting conclusions, and one observation that I’ve made is that most of the Shrouded Land’s fauna is native to India, or was in the recent past. India is lucky to have much of the world’s charismatic megafauna, which helps.
I point this out not to limit you, but to inspire! I think it’s cool to imagine the nordanbjorn as sloth bears, the deer as blackbucks, the elephants as Indian elephants, the lions as Asiatic lions, and so on. India: Cormorants, vultures, pit vipers, hyenas, jackals, peacocks, chickens, lions, tigers, leopards, elephants, mammoths (extinct), catfish, buffalo, parakeets, ibises, pythons, mosquitoes, boar, bears, crocodiles. Other parts of Asia: Alligators, wooly rhinos (extinct), crayfish, beavers, apes, antelope
Africa: Giraffes, hippos, ostriches, dodos, crayfish
Australasia: Butcher birds, koalas, macropods, birds of paradise, crayfish
Americas: Mocking birds, pumas, hummingbirds, electric eels, blind salamanders, lemurs, spider monkeys, musk rats, coyotes, crayfish, voles, snapping turtles