GYEFALCONS. 



609 



almost white with age. It inhabits the Arctic regions, where it 

 feeds on large birds, principally Gallinacece or Palmipedes. 



Three varieties of this species are known, all verj^ similar to 

 each other : the White Falcon, called by Buffon the White Gyr- 

 falcon of the North, which inhabits the extreme north of the two 



Fig. 235.— Sultan Falcons (F. pcrerjrinator). 



continents ; the Faico islcmdkus, or Gyrfalcon of Iceland, peculiar 

 to that country ; and the Gyrfalcon of Norway, which is found in 

 Scandinavia, and sometimes appears in Germanj', Holland, and 

 France. 



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