FAMILY ANATIDAE I4I 



They come also to fresh-water impoundments near Changuinola, 

 but I have no detail as to their abundance in this area. 



ANAS DISCORS Linnaeus: Blue- winged Teal; Cerceta Ala-azul 



Figure 25 



Small size and grayish-blue patch on the shoulder distinguish this 

 teal from other ducks found in Panama. 



Description. — Length 340 to 380 mm. Male, head and neck dark 

 gray, blacker on crown, with a broad white patch on the side of the 

 forepart of the head; upper surface blackish, with edgings of buff 



Fig. 25. — Foot of blue-winged teal, cerceta ala-azul, Anas discors, without a 



lobe on the hindtoe. 



and dull gray; lesser and middle wing coverts and a line on the 

 tertials grayish blue, forming a prominent patch; primary coverts 

 broadly white at ends, black at base; speculum deep green; under 

 tail coverts black, with a white patch on flanks ; rest of lower surface 

 dull rusty brown, barred and spotted with black, the feathers white 

 basally. 



Female, duller, marked by grayish-blue shoulder patch; no white 

 on head or flank; under surface mottled with dull white, dull buff, 

 and dull black ; exposed culmen 37-41.5 mm. 



