3/2 BIRDS OF THE REPUBLIC OF PANAMA — PART 2 



ACESTRURA HELIODOR HELIODOR (Bourcier) : Gorgeted 

 Woodstar, Estrella Montanesa Gorguera 



Ornismya heliodor Bourcier, Rev. Zool., vol. 3, September 1840, p. 275. (Bogota, 

 Colombia.) 



Very small ; male with the reddish purple gorget elongated in a 

 point on either side of the neck; female like that sex in the Costa 

 Rican woodstar, but definitely smaller throughout, brighter bronze- 

 green above, and with crown like back. 



Description. — Length 68-75 mm. Male, with rectrices very narrow, 

 somewhat elongated and pointed, the outermost shorter, more slender, 

 and with thickened shaft ; female, with rectrices longer and of normal 

 form. Adult male, above dark shining green, including cheeks and 

 wing coverts, except primary coverts, which are partly black ; central 

 pair of rectrices, one-half length of those adjacent, slightly shorter 

 than outermost pair ; entire tail black with a purple sheen ; wings, 

 including anterior edge, dusky with a faint purplish sheen ; a small 

 white spot behind the eye; lores black; gorget reddish purple, with 

 lower margin square cut on center of foreneck, much elongated on 

 the side of the neck, with the terminal feathers narrowed and pointed, 

 bordered below by a narrow band of white; lower foreneck and 

 upper breast dark gray ; a spot on either side of rump and tibial tufts 

 white ; rest of under surface, including under tail coverts, and under 

 wing coverts, dark iridescent bluish green. 



Adult female, above bright iridescent bronze-green ; broad central 

 rectrices, shorter than others, like back ; next pair somewhat longer, 

 iridescent green basally, with rufous shaft and dull black tip; outer 

 pairs cinnamon-rufous, with a wide subterminal band of black; 

 a small white spot behind eye, and a slight indication of white in the 

 auriculars ; entire under surface, including rictal area, light cinnamon- 

 buff to white, usually whiter on breast, darker on sides and under 

 tail coverts ; white tufts beside the rump and on the tibia as in male. 



Immature male, in color like female. 



Bill, feet, and claws black. 



Measurements. — Males (10 from Colombia), wing 28.0-29.7 

 (29.0), tail 18.2-20.8 (19.7), culmen from base 13.0-15.3 (14.6) mm. 



Females (10 from Colombia), wing 33.3-38.9 (35.8), tail 15.0- 

 17.2 (15.7), culmen from base 14.3-16.5 (15.4) mm. 



The difference in wing length, with the female decidedly the larger, 

 is unusual. Four immature males resemble adult females in having 

 shorter tails than adult males. Their wing measurements, ranging 



