182 AMShe, AUDUBON WARBLER. 
WHILE only a little less lovely than its local kinsman, the Audubon 
- Warbler, by as much as it has four patches of gold instead of five, this 
beautiful migrant appears to have been very largely lost to sight in the 
throng of its more brilliant relatives. Rathbun, writing from Seattle, says 
of it: “A regular and not uncommon spring migrant, associating with 
D. auduboni. Have no fall record.” Bowles from Tacoma says: “An 
irregular fall migrant, very numerous some years, the fall of 1905 for 
example. Have never seen it in spring.” Yakima, April 30, 1891; Chelan, 
May 22, 1905; Tacoma, April 27, 1907, are some of my own records. 
Fannin gives the species as ‘An abundant summer resident, chiefly west of 
the Cascades,” in British Columbia, and it should occur regularly within our 
borders during migration. 
The tchip note of the Myrtle Warbler is indistinguishable from that of 
D. auduboni, but a single glimpse of the white throat is sufficient to establish 
identity. Those seen have necessarily been at close quarters and ranging 
low, in willow thickets, along the margins of ponds, etc., but it is altogether 
possible for a migrant troop to hold to the tree-tops in passing and so elude 
observation from “Forty-nine” to the Columbia. 
No. 75. 
AUDUBON’S WARBLER. 
A. O. U. No. 656. Dendroica auduboni (Towns. ) 
Synonym.—WESTERN YELLOW-RUMPED WARBLER. 
Description.—Adult male: Similar to D. coronata but throat rich gamboge 
yellow; auriculars bluish gray instead of black; a large white wing patch formed 
by tips of middle and outer edges of greater coverts; tail with white blotches on 
inner webs of four or five outer feathers; usually more extensively black on 
breast. Adult female: Similar to adult male but duller (differences closely cor- 
responding with those in D. coronata) ; the white of wing patch nearly obsolete; 
the yellow of throat paler and often, especially on chin, more or less displaced 
by white (young females even of the second summer are sometimes absolutely 
without yellow on throat but the more abundant white on rectrices is distinctive 
as compared with D. coronata). Seasonal changes follow very closely those of 
D. coronata but yellow of throat is usually retained in winter save in young 
females and (occasionally) young males. Length of adult about 5.50 (139.7) ; 
wing 3.00 (76) ; tail 2.45 (57); bill .41 (10.4) ; tarsus .80 (20.3). 
Recognition Marks.—Warbler size; five spots of yellow; extensive white 
blotching of tail; yellow rump distinctive in any plumage save as compared with 
D. coronata, from which it is further distinguished (usually) by yellow or yel- 
lowish of throat (If this character fails, the more extensive white on tail will 
always hold). 
Nesting.—Nest: a well built, bulky structure of fir twigs, weed stems, 
