82 PICTURE OF ORGANIZED NATURE. 



Cherryfinches, and consist of eight species, and 

 also the Manakins (Pipra) of twenty-nine species, 

 are peculiar to warm countries ; and do not extend 

 above the 30th degree of latitude. 



52. The family of Tanagers (Tanagra), which is 

 related to the Hammers, is confined to the Warm, and 

 to the contiguous parts of the Temperate, Zone. Only 

 one species (T. rubra) is found in North America. 



Of the family of HENS (Gattince), Partridges and 

 Woodcocks (Tetrao) are the only species diffused 

 over all the zones, and met with near the snow-line. 

 All the other Genera become more numerous in the 

 warmer part of the Temperate Zone, but are found 

 most plentiful in the Torrid Zone. 



53. Of the seventy- one known species of Par- 

 tridges and Wood-hens, the largest extend nume- 

 rously over the Cold and contiguous parts of the 

 Temperate Zone. The Heath-cock inhabits the cold 

 countries of Europe and Asia, and the Alps of the 

 Temperate Zone. The Heath-hen has also the same 

 range. The White Grouse (Tetrao lagopus) is found 

 partly on the Alps, and partly in the Polar countries ; 

 for instance, in Greenland, near the snow-line. The 

 Lapland Grouse (T. Lapponicus) inhabits the moun- 

 tains of Lapland. The Hazel Grouse (T. bonasia) 



