Got to love that Tasmanian Tiger. Unfortunately the real species was declared extinct in 1986, 50 years after the last confirmed sighting. For more info on this wonderful Australian animal, check out the page on wikipedia:
http://en.wikipedia.org/wiki/Tasmanian_Tiger
Which brings up an interesting point - the form of Wikuni children is guided by magic, and seems to be completely random (ie the type of animals that the parents resemble gives no indication as to the type of animal that the child will resemble). If an animal species dies out, does that mean that no more Wikuni will be born into that form?
In other words, are there Dodo wikuni still wondering around the oceans of Sennadar?