320 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. IX. 



Mallard Duck. 



Male. 



Genus ANAS Linn. 



40. Anas platyrhynchqs LINN. 

 MALLARD DUCK. 



Anas boschas Linn., A. O. U. Check List, 1895, p. 48. 

 Distr.: Northern hemisphere, breeding nearly throughout the tem- 

 perate zone; south in winter to Cuba, Lower California, Mexico, and 

 Central America to Panama. 



Adult male: Head and neck, dark green, 

 with a white ring on the neck; under parts, 

 whitish or ashy white; breast, rich chestnut 

 brown; under tail coverts, black; upper tail 

 coverts are also black with central feathers 

 elongated and curved upwards; speculum, 

 purple, bordered with black and white; feet, 

 orange red; bill, yellowish olive. 



Adult female: Speculum, purple, bordered with black and white; 

 head, brownish buff; belly, buffy brown, usually mottled; feet, 

 orange red. 



