120 ALASKAN YELLOW WARBLER 



Biographical References 



(i) O. W. Howard, Summer Resident Warblers of Arizona, Bull. Cooper 

 Orn. Club (=Condor), I, 1899, 39. 



Alaskan Yellow Warbler 



DENDROICA ESTIVA RUBIGINOSA (Pall.) 



Subspecific Characters. — Similar to Dendroica astiva astiva but slightly 

 smaller, adult <? darker above, the crown of nearly the same color as the back, 

 only the forehead yellower; the rump more nearly the color of the back than 

 in astiva. 



Adult $ and young darker (greener, less yellow) above than those of 

 astiva. Wing, 2.40; tail, 1.70; bill, .40. 



General Distribution. — British Columbia and Alaska. 



Summer Range. — Vancouver Island northward through British 

 Columbia and Alaska, both on the coast and in the interior. 



Winter Range. — Migrates southward through California and 

 winters in Mexico and Central America. 



The Bird and its Haunts. — In his admirable work on Alaskan 

 birds Nelson 1 writes, "This is perhaps the most abundant Warbler 

 throughout Alaska. It is found everywhere in the wooded interior, 

 or the bushy borders of the water-courses, or frequenting the scat- 

 tered clumps of stunted alders. * * * Its lively presence, even 

 among the pleasant surroundings of the south, lends animation to the 

 scene, and even more impressive is its presence under the dismal skies 

 and in the damp, depressing climate of the north, where such visitants 

 are only too rare." 



Nesting Site. — "Breeds on the shores of the Arctic Ocean 

 wherever it can find a willow or alder patch wherein to place its nest 

 and shelter its young. * * * It is the only Warbler, with the 

 exception of the Black-capped Flycatcher (Sylvania pusilla pileolatd), 

 which nests in the alder-thickets in the vicinity of St. Michaels." 

 (Nelson 1 .) 



Nest. — The nest does not appear to have been described. Doubt- 

 less it resembles that of Dendroica (estiva (estiva. 



Eggs. — No authentic sets of this bird's eggs are recorded, but 

 doubtless they resemble those of the Yellow Warbler. 



Biographical References 



(1) E. W. Nelson, Natural History Collections made in Alaska, 1887, 201. 

 (These notes are given under the name Dendroica astiva, the Alaskan form 

 not being recognized until 1897.) 



