170 THE BIRDS OF MO NT RE A L . 



inches long. Adults: Head, neck and tail white; 

 rest of plumage varying from dusky grayish-brown 

 to brownish-black. Immature plumage, second or 

 third year : Head and neck blackish, feathers of 

 neck above tipped with pale-brownish, tail blackish, 

 with whitish markings, back grayish-brown and 

 blackish ; below, mixed white and dusky. Young, 

 first year : Whole plumage blackish ; feathers of 

 lower parts white at base, producing a blotched 

 appearance. 



109. White Gyrfalcon. 



Length of male, about 22 inches, tail about 9 

 inches long. Female, about 24 inches long, tail 

 about 10 inches long. Adults: Plumage mostly 

 white ; upper parts spotted with dusky. Young : 

 Above, spotted or striped with dusky, and lower 

 parts striped with same. 



110. Duck Hawk. 



Length of male, about 17 inches, tail about 7 

 inches long. Female, about 19 inches long, tail 

 about 8| inches long. Adults : Above, dark-slaty ; 

 below, creamy-buff. Young : Similar to plumage 

 of adults, but more deeply coloured. 



111. Pigeon Hawk. 



Length of male, about 10J- inches, tail about 5 

 inches long. Female, about 13 inches long, tail 



