52 BULLETIN 186, UNITED STATES NATIONAL MUSEUM 



ANAS CRECCA CRECCA Linnaeus 



Eurasian Green-winged Teal 



[Anas] Crecca Linnaeus, Systema naturae, ed. 10, vol. 1, 175S, pp. 126-127 ("in 

 Europae aquis dulcibus" ; type locality restricted to Sweden, apud Hartert). 



Nettion crecca, Rogees and Deignan, Proc. Biol. Soc. Washington, 1934, p. 92 

 (Chiang Mai) ; Journ. Siam Soc. Nat. Hist. Suppl., 1936, p. 75 (Chiang Mai). 



The green wing is an uncommon winter visitor, known only from 

 Chiang Mai and Chiang Rai Provinces, but is probably generally, if 

 locally, distributed in the North. I have found it at Chiang Mai from 

 December to February and have specimens from Chiang Saen Kao, 

 taken January 14 and 19, 1937. 



It occurs at the same places as the garganey and sometimes at pools 

 in open, swampy woods; I have seen as many as 100 individuals 

 in a single flock. The flight of this species is extremely swift. 



A female had the irides brown; the maxilla slaty, flecked with 

 black, the tip and edges of the commissure black ; the mandible light 

 brown, tipped darker ; the feet and toes gray with a brownish tinge ; 

 the webs dark gray ; the claws dark brown. 



The drake has the head and neck chestnut, with a broad band of 

 glossy green running back from the eye; the upperparts finely ver- 

 miculated black and white; the underparts white, with black spots 

 on the breast and black vermiculations on the sides of the body; the 

 wings gray, with a speculum, partly black and partly glossy green, 

 edged above with a white bar. The female differs in having the entire 

 upperparts brown, each feather edged with rufous-buff; the under- 

 parts white, with obsolescent spots on the breast. 



ANAS ACUTA Linnaeus 



Pintail 



[Anas] acuta Linnaeus, Systema naturae, ed. 10, vol. 1, 1758, p. 126 ("in 



Europae maritimis" ; type locality restricted to Sweden, apud Hartert). 

 Dafila aquta [sic], Gyedenstolpe, Kungl. Svenska Vet.-Akad. Handl., 1916, p. 



135 (Phayao) ; Ibis, 1920, p. 774 (Phayao). 

 Dafila acuta acuta, Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 1931, p. 174 



(Chiang Mai) ; 1936, p. 75 (Chiang Mai). 



The pintail is probably present in greater numbers than any other 

 species of northern duck that reaches Thailand in the cold weather. 

 I found it uncommon but regularly present at Chiang Mai from 

 October to late in February, chiefly on the large marshes, but some- 

 times at quite small pools among the ricefields and on woodland 

 ponds. I have seen as many as 50 birds in a single flock over the 

 marshes between Chiang Mai and Lamphnn. 



Two females had the irides dark brown; the maxilla plumbeous, 

 with the culmen, edges of commissure, and corners of mouth slaty; 

 the mandible slaty, tinged fleshy at the base; the interior of the 



