SPREADING OF BIRDS. 83 



belongs to the inhabitants of the Alps. Partridges 

 are natives of Temperate countries ; but Quails are 

 particularly common to warm countries. 



54. Of Bustards (Otis), the Great Bustard (0. 

 tarda) extends only northwards, and not farther 

 than Sweden or Russia ; but is met with towards the 

 South, as far as Greece and Syria. The other eleven 

 species of this Genus inhabit the warmer parts of 

 the Temperate Zone. Besides the great Bustard, 

 there is in Southern Germany the little one also. The 

 Ruffed Bustard alone is found in Silesia. 



55. Of the family of Pigeons (Columba), the 

 Wood-Dove, Ring-Dove, and Turtle-Dove, are na- 

 tives of the Old World, and extend nearly as far as 

 the 60th degree of latitude : arid in America the 

 Wood-Pigeon (C. migratorid) likewise reaches the 

 60th degree. The Wood-Dove is met with in Swe- 

 den, and the southern parts of Russia. The Ring- 

 Dove lives in Sweden, but not in Norway. The 

 Turtle-Dove keeps more southward. Of the other 

 Pigeons (nearly seventy-seven species), the hand- 

 somest, most numerous, and largest, extend towards 

 the warm countries. 



56. The family of Pheasants (Phasianus) does 

 not extend beyond the 46th degree of latitude. The 

 Domestic Hen, which belongs to that family, lives in 



