As regards the other group of flying animals--birds--Australia is even of greater interest, for here are found unique archaic forms of life, such as the Emu, Cassowary, Mound-Builders, and Lyre-Birds, and "every widely-spread family of birds but two is represented; the only widely-spread families of birds totally absent from Australia are Woodpeckers and Vultures." Woodpeckers, however, have crossed Wallace's line into Celebes and adjacent islands, and may yet reach Australia naturally. Further, many well-known birds, such as Pigeons, Parrots, and Kingfishers, reach their highest development in the Australian region, and, more important still, the whole bird world seems to reach its culminating point in this wonderland. It is a factor adding to the interest of Australia's fauna that three of the four families placed at the head of the bird world in the natural system of classification adopted by ornithologists, and used by Dr. Sharpe in his just recently completed _Hand-List of Birds_, should be absolutely confined to the Australian Continent and adjacent islands. Thus Australia can justly claim to be the most highly developed of regions, so far as birds are concerned, for Bower-Birds, Birds of Paradise, and Bell-Magpies (_Streperas_) are peculiar, while the penultimate family--the Crow family--is shared with the other regions of the world. Thus, with regard to birds, the term "fossil continent" applied to Australia is not appropriate, as it is but partly true. Since the birds native to Australia are so interesting in themselves, and are so varied in kind, Australians should know, love, and jealously protect these beautiful creatures. Strict regulations should be framed to prevent the exploitation of Nature's gifts by those who destroy useful or precious and rare birds for the sake of gain. Even collectors, who, under the guise of scientific work, collect eggs, and kill birds to trade in their skins, should be supervized.