Swamp wallabies, Wallabia bicolour are different from all other wallabies due to their unique teeth and lower number of chromosomes. They have a very broad premolar which is used to help them eat very coarse plant material. These animals have a very different hop to kangaroos, keeping their head down and tail straight out instead of keeping their head up.
Parma wallabies, Macropus parma are the smallest of the kangaroo, wallaby and wallaroo species. They were discovered in 1840, but due to their shy nature they were thought to be extinct.
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Kangaroos and wallabies are good swimmers and use their tails to help them swim.