White Storks (Ciconia alba, C. boyciana, and Euxenura maguari).
The White Crane (Grus leucogeranus).
The Snow Geese (Chen nivalis, C. rossi).
The Common Gannet (Sula bassana).
The White Buzzard (Leucopternis).
The Scavenger Vultures (Neophron).
A recurring combination in mammals is black, with a white marking on the breast.
Most of the bears, even young brown bears, show a tendency to this. It is also found in the Tasmanian devil, and in varieties of our domestic cats, rats, and dogs; also in the domestic duck.
The white-spotted pelage, not uncommon in deer, especially fawns, is curiously repeated in the Australian carnivorous marsupials, known as Native Cats (Dasyurus).
In domestic animals we frequently find the following localisation of white—white socks, collar, breast, and muzzle. The arrangement occurs in cats, dogs, rabbits, guinea-pigs and mice, also in the horse and pig, but without the collar. The arrangement is not seen in goats, cattle, or sheep, nor in wild animals of any kind. This would lead to the conclusion that the combination is correlated with some character unfavourable to survival under natural conditions.