Of the larger kangaroos, which attain a weight of 200 lb and more, eight species are named, only one of which is found in Western Australia.
Huxley in 1880 briefly suggested the arboreal origin, or primordial treehabitat of all the marsupials, a suggestion abundantly confirmed by the detailed studies of Dollo and of Bensley, according to which we may imagine the marsupials to have passed through (r) a former terrestrial phase, followed by (2) a primary arboreal phase - illustrated in the tree phalangers - followed by (3) a secondary terrestrial phase - illustrated in the kangaroos and wallabies - followed by (4) a secondary arboreal phase - illustrated in the tree kangaroos.
The Arunta hold that the spirits of kangaroos are expelled by human blood from certain rocks.
Fossil bones of extinct kangaroo species are met with; these kangaroos must have been of enormous size, twice or thrice that of any species now living.
Kangaroos are vegetable-feeders, browsing on grass and various kinds of herbage, but the smaller species also eat FIG.