The Making of Species 



As examples of this scheme of colouration we 

 may cite 



Black-and-white Fruit Pigeons (Myristicivora). 



Several Gannets (Sula capensis, S. serrator, 

 etc.) 



Swallow-tailed Kite (Elanoides furcatus). 



Several Storks (Euxenura maguari, Anastomus 

 oscitans, P seudotantalus cinereus). 



Moreover, a common variety of the barn-door 

 fowl has also a white body and black primaries 

 and tail, showing that this scheme of colour may 

 arise as a mutation. 



A further elimination of black in the tail and 

 body leads us to white birds with more or less 

 black wings : 



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 



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