Looks like a kangaroo or wallaby but in fact the swamp, or black wallaby (wallaby bicolor) is the only living member of the genus Wallabia. The difference is all in the chromosomes, apparently.
Sure it hops with the best of them but, unlike the others, it puts its head down when going for it in the bush. Love the long tail with the white tip - this one is standing in our pond which is now full of water again after yesterday's torrential rain. The frogs are in their element!
Check out more about swampies at:
http://www.wiresnr.org/swampwallabyfacts.html