Nudibranchs, proper long- and short-beaked echidna (not those weird Mobian ones), bilbies (I can only think of one off the top of my head), insects in general (moths and bees seem to be getting more popular)... uhm. There's a lot more, but those are the oddest ones I can think of. The echnida happens to be my favorite animal just behind rabbits. c|

non-mammals, that's what really rare.

MOAR COMPIES

Also maybe insects, certain kinds of sea life and birds.

Or how about this? Giant prehistoric wombat! http://www.telegraph.co.uk/news/wor.....Australia.html

Feesh! Also inveribrates!

Fishies that aren't mer-people.

And chinchillas. XD

Well you have Jellyfish,New Zealand Kiwi's, Mexican Axolotl, New Zealand Kagu, Leafy seadragon, Its a kind of seahorse, and Giant Coconut Crab. Hope this helps ^.^