MUSCOVY DUCK 



be found there at the season when this 

 plumage, called the eclipse plumage, is worn. 



i. Cairina moschata (Linnaeus) 

 Muscovy Duck. "Pato real" 



Adult male. Length 815 mm. (32.00 in.); 

 tail 230 mm. (9.00 in.). Head, neck and under 

 parts glossy brownish black; upper parts met- 

 allic blackish green; wing coverts pure white. 

 Bare skin about base of bill red; bill pinkish. 



Female. Much smaller. Length 610 mm. 

 (24.00 in.) ; tail 140 mm. (5.50 in.). 



A native species; a large dark colored duck 

 with the white wing coverts conspicuous in 

 flight. It often occurs on the Chagres and 

 other rivers. 



2. Dendrocygna viduata (Linnaeus) 

 White-faced Tree Duck 



Length about 456 mm. (17.90 in.); tail about 

 85 mm. (3.80 in.). 



Fore part of head white, rest of head and 

 upper part of neck black with a white patch on 

 fore neck ; lower part of neck and chest all around 

 rich chestnut ; rest of upper parts reddish brown ; 

 abdomen including under tail coverts, black. 



A specimen of this South American duck was 

 shot on one of the rivers entering Gatun Lake, ih 

 June 1924, and sent to me by Commander Mar- 

 shall Collins, U.S.N. 



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