FAMILY PARULIDAE 



285 



blackish stripes; remiges dusky, edged light yellowish olive; rectrices 

 light yellowish olive; eye-ring white; undersurface white with narrow 

 blackish streak on side of throat and blackish streaks across breast and 

 down sides and flanks; underwing coverts white, tinged yellow. 



The North American Ovenbird is a fairly common migrant and 

 winter resident in western Panama, becoming uncommon to rare to the 

 east. In Darien it has been recorded only twice (Griscom, Bull. Mus. 

 Comp. Zool., vol. 78, 1935, p. 368). I have always found it in dry for- 

 est, but it has been collected from sea level to 2900 m, on Volcan de 

 Chiriqui (Bangs, Proc. New England Zool. Club, vol. 3, 1902, p. 62). 



The Ovenbird has been found in Panama from late September until 

 April 25 (Loftin and Olson, Carib. Journ. Sci., vol. 3, no. 4, 1963, p. 

 195). There are numerous recapture records from the Gorgas Memo- 

 rial Laboratory banding station at Almirante, Bocas del Toro. A par- 

 ticularly notable one is of a bird banded there October 13, 1963, and re- 

 captured April 23, 1965, and again on October 17, 27, and 28, 1965 

 (Loftin et al., Bird-Banding, 1967, p. 151). Another study done at 

 Almirante found the weight of 87 fall migrant Ovenbirds to range from 

 12.9-19.0 (15.74) g and that the birds had exhausted their migratory 

 fat reserves (Rogers and Odum, Wilson Bull, 1966, p. 418). Willis 

 (Living Bird, 1966, p. 206) noted that on Barro Colorado Island, 

 Canal Zone, where the Ovenbird is rare, it normally ignores army ants. 

 There it has been recorded from October 18 to March 31 (Willis and 

 Eisenmann, Smiths. Contrib. Zool. no. 291, 1979, p. 26). 



Two subspecies have been identified as occuring in Panama, auro- 

 capillus and furvior. 



SEIURUS AUROCAPILLUS AUROCAPILLUS (Linnaeus) 



Motacilla aurocapilla Linneaeus, 1766, Syst. Nat., ed. 2, 1, p. 334. (Pennsylvania.) 



Seiurns aurocapillus canivirens Burleigh and Duvall, 1952, Wilson Bull., 64, p. 39. 

 (Margaret, Fannin County, Georgia.) 



Characters. — Upper surface more greenish; central crown stripe 

 more yellowish. 



Measurements. — Males (10 from the breeding range, taken in May) , 

 wing 73.3-80.6 (78.0), tail 52.7-58.5 (56.7), oilmen from base 13.2- 

 15.0 (13.8), tarsus 19.3-23.7 (20.9) mm. 



Females (10 from the breeding range, taken in May), wing 69.5- 

 77.2 (73.4), tail 51.3-57.6 (53.9), oilmen from base 12.7-14.7 (13.5), 

 tarsus 19.3-22.1 (20.9) mm. 



Migrant and winter visitor from the north. The Smithsonian has 7 



