190 DOMESTIC PIGEONS t Chap. YI, 



was evident.2 Nevertheless, Mr. E. Scot Skirviiig informs 

 me that he often saw crowds of pigeons in Upper Egypt 

 settling on low trees, but not on palms, in preference to 

 alighting on the mud hovels of the natives. In India Mr. 

 Blyth ^ has been assured that the wild C. livia, var. intermedia, 

 sometimes roosts in trees. I may here give a curious instance 

 of compulsion leading to changed habits : the banks of the 

 Nile above lat. 28° 30' are perpendicular for a long distance, 

 so that when the river is full the pigeons cannot alight on 

 the shore to drink, and Mr. Skirving repeatedly saw whole 

 flocks settle on the water, and drink whilst they floated down 

 the stream. These flocks seen from a distance resembled 

 flocks of gulls on the surface of the sea. 



If any domestic race had descended from a species which 

 was not social, or which built its nest and roosted in trees,* 

 the sharp eyes of fanciers would assuredly have detected some 

 vestige of so difierent an aboriginal habit. For we have 

 reason to believe that aboriginal habits are long retained 

 under domestication. Thus with the common ass we see 

 signs of its original desert life in its strong dislike to cross 

 the smallest stream of water, and in its pleasure in rolling in 

 the dust. The same strong dislike to cross a stream is 

 common to the camel, which has been domesticated from a 

 very ancient period. Young pigs, though so tame, sometimes 

 squat when frightened, and thus try to conceal themselves 

 even on an open and bare place. Young turkeys, and occa- 

 sionally even young fowls, when the hen gives the danger- 

 cry, run away and try to hide themselves, like young par- 

 tridges or pheasants, in order that their mother may take 



* I have heard through Sir C. Lyell ■* In works written on the pigeon 



from Miss Buckley, that some half- by fanciers I have sometimes observed 



bred Carriers kept during many years the mistaken belief expressed that 



near London regularly settled by day the species which naturalists called 



on son>e adjoining trees, and, after ground-pigeons (in contradistinction 



being disturbed in their loft by their to arboreal pigeons) do not perch and 



young being taken, roosted on them at ruild on trees. In these same works 



night. ty fanciers wild species resembling 



^ 'Annals and Mag. of Nat. Hist.,' ihe chief domestic raees are often said 



2nd ser., vol. xx., 1857, p. 509 ; and to exist in various parts of the world, 



in a late volume of the Journal of the but such species J^re quite unknowD 



Asiatic Society. to naturalists. 



