Baby platypuses - my favorite animal. Platypuses are utterly unique animals - they're egg-laying mammals - monotremes. The mothers breastfeed the babies, although they don't have nipples - the babies push against the mother's chest and milk oozes out. The males have a venomous spur behind their hind leg. It has electroreceptors - kind of like the electric version of sonar in a bat - to help it to find it's moving prey underwater, even around objects. Although for years platypuses were thought to be an offshoot of the mammals, recent DNA results have shown them to be composed of avian, mammalian, and reptilian DNA! Platypuses are natives of Australia, and there are no platypuses outside of the country. There are very few kept in zoos even in Australia, as they are hard to keep alive in captivity. I love platypuses so much I once traveled to Sydney, Australia solely to see one in person. It was a beautiful, beautiful thing - they truly are magical animals.