The Black-throated Green Warbler 



different — the blacks only slightly veiled by whitish tips (these tips, irregularly, persist 

 until April). Adult female in spring: Similar to adult male in spring, but black of 

 lower parts much reduced, displaced by yellow on chin and upper throat, and veiled 

 elsewhere by whitish or buffy edgings. In autumn: Blacks still further veiled by 

 buffy edgings; the upper throat dull yellow or buffy and marked obscurely with oliva- 

 ceous irruptions on sides. Immature male: Much like female in autumn, but blacks 

 a little stronger everywhere, and appearing under yellow veiling of upper throat. 

 Length about 127 (5.00). Av. of 9 males: wing 63.8 (2.51) ; tail 47.8 (1.88); bill 9.9 (.39); 

 tarsus 17.3 (.68). Av. of 7 females: wing 60 (2.36); tail 46 (1.81); bill 9.7 (.38); 

 tarsus 17.3 (.68). 



Recognition Marks. — Small warbler size. Warbler green without spots above; 

 black of throat contrasting with yellow of cheeks and white of underparts. 



Nesting. — Does not breed in California. Nest: Of twigs, bark-strips, grass, 

 moss, and feathers; settled loosely into needles on upper side of horizontal branch of 

 coniferous tree, 10 to 50 feet up. Eggs: 4; white, with creamy or buffy tints, speckled 

 and spotted with vinaceous gray and chocolate, usually gathered in loose wreath about 

 larger end. Av. size 16 x 12.5 (.63 x .49). 



General Range. — North America, breeding in Transition and Lower Canadian 

 zones, in the states and provinces lying each side of the 49th Parallel, and from Alberta 

 east to Newfoundland; south in the Alleghany Mountains to Georgia; wintering in 

 Mexico and south to Panama. 



Occurrence in California. — Accidental during migrations; one record: adult 

 female taken on the Farallon Islands, May 29, 191 1. 



Authorities. — Dawson, Condor, vol. xiii., 191 1, p. 168 (Farallon Ids., May 29, 

 191 1, one spec; June I, 191 1, one seen). 



ON THE evening of May 29, 191 1, the author, in company with 

 John F. Rowley, secured, at all too close range, a female of this char- 

 acteristic eastern species. It had settled momentarily upon the ground 

 in front of the head light-keeper's house on the S. E. Farallon. Unfortu- 

 nately most of the bird's head was carried away by a bunched charge 

 of shot, but "the remains," deftly prepared by Mr. Rowley, are now in 

 the Academy collections in San Francisco to attest the validity of this 

 first and only record. Another specimen, also a female, was seen in 

 company with such other migrants as Redstart, Magnolia Warbler, 

 etc., on the afternoon of June 1st; but no attempt was made to secure 

 it. As significant of the fine shades of distinction necessary in identifying 

 these warblers, I was amused (?) to find that an assistant curator at the 

 Academy had filed this specimen away as D. townsendi. Dr. Grinnell, 

 however, confirms our original diagnosis. 



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