There are also numbers of spoonbills, nearly white in plumage; the beautiful, stately flamingo; the Numidian crane, or demoiselle, some of which, tamed at Government House, Cape Town, struck every one as most graceful ornaments to a noble mansion, as they perched on its pillars. There are two cranes besides--one light blue, the other also light blue, but with a white neck; and gulls ('Procellaria') of different sizes abound. One pretty little wader, an avoset, appears as if standing on stilts, its legs are so long; and its bill seems bent the wrong way, or upward. It is constantly seen wading in the shallows, digging up little slippery insects, the peculiar form of the bill enabling it to work them easily out of the sand. When feeding, it puts its head under the water to seize the insect at the bottom, then lifts it up quickly, making a rapid gobbling, as if swallowing a wriggling worm. The 'Parra Africana' runs about on the surface, as if walking on water, catching insects. It too has long, thin legs, and extremely long toes, for the purpose of enabling it to stand on the floating lotus-leaves and other aquatic plants. When it stands on a lotus-leaf five inches in diameter, the spread of the toes, acting on the principle of snow-shoes, occupies all the surface, and it never sinks, though it obtains a livelihood, not by swimming or flying, but by walking on the water. Water-birds, whose prey or food requires a certain aim or action in one direction, have bills quite straight in form, as the heron and snipe; while those which are intended to come in contact with hard substances, as breaking shells, have the bills gently curved, in order that the shock may not be communicated to the brain.