142 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I50 



Common winter visitor; most abundant of all ducks; found 

 wherever there are fresh-water ponds, and along the larger rivers, 

 from sea level to lakes and pools in mountain areas. 



Two geographic races are represented among those that come to 

 Panama. 



Records of the 121 banded blue-winged teal that have been reported 

 from Panama all came from the interior range of the typical sub- 

 species and cover the suitable lowland areas in the Republic, but more 

 especially such well-known shooting localities as the mouth of the 

 Rio Tuira in Darien, the La Jagua marshes in eastern Province of 

 Panama, the marshes near Rio Hato and Aguadulce, Code, the area 

 from Paris, Herrera to Las Tablas, Los Santos, and the vicinity of 

 Pedregal in western Chiriqui. The returns indicate a considerable 

 flight from the north during October, with a few earlier as shown by 

 dates of birds killed in Chiriqui, September 12, and in Code, Septem- 

 ber 19. Seven of the reports are of birds shot more than 2 years 

 after having been banded, one having lived for 4 and another for 5 

 years. 



ANAS DISCORS DISCORS Linnaeus 



Attas discors Linnaeus, Syst. Nat., ed. 12, vol. 1, 1766, p. 205. (South Carolina.) 



Characters. — The typical subspecies is somewhat lighter in color 

 than Anas d. orphna. 



Measurements (from Stewart and Aldrich, Proc. Biol. Soc. Wash- 

 ington, 1956, pp. 31-32).— Males (25 specimens), wing 173-193 

 (181.9), tail 59.5-71.5 (64.6), culmen 37.5-42.0 (39.9), tarsus 30-35 

 (32.2) mm. 



Females (15 specimens), wing 167-183 (174.5), tail 59.5-70.0 (64), 

 culmen 37-40 (38.9), tarsus 30-33 (31.4) mm. 



Migrant from the north. The abundant form in Panama. 



Records of actual occurrence, assumed to be the typical race, are 

 as follows : 



Chiriqui: Lakes at 1,280 meters, near EI Volcan; Las Lajas (one Feb. 15, 



1956). 

 Bocas del Toro: Changuinola, abundant; Almirante (specimen, Oct. 27, 1960). 

 Veraguas: Laguna del Castillo (Salvin, Proc. Zool. Soc. London, 1870, 



p. 219). 

 Herrera : Cienaga Macana, Cienaga de Buho. 

 Los Santos : Punta Mala. 

 Code : Puerto Aguadulce. 

 Col6n (western) : Rio Indio. 

 Canal Zone : Mindi, Gatun Lake, Gamboa, Juan Mina, Chiva Chiva Lakes. 



