WHITE-CHEEKED GOOSE. 73 



BR ANT A CANADENSIS OCCIDENTALIS. 



Geographical Distribution. — From Sitka, Alaska, along the 

 Pacific coast to California. 



Adult. — Head and neck, black, the former having a large 

 white patch covering sides of head and throat, sometimes sep- 

 arated by a black line on the throat, and extending upward to 

 above and behind the eye. Chin, black. At the base of the 

 black neck is a more or less distinct white collar. Back and 

 wings, brown, lighter than in B. catiadensis, with a grayish 

 tinge, each feather tipped with white or brownish white. Pri- 

 maries, black. Rump, black. Underparts, dark brownish gray, 

 ending abruptly at the anal region, which, together with the 

 upper and under tail coverts, is white. Tail, black. Bill and 

 feet, black. Tail feathers, 18-20. Total length, 33-36 inches; 

 wing, 16^18; tail, about 6; tarsus, 2^; culmen, i-^. 



