354 
PASSERIFORMES 
Distinctions. Except within the range of Audubon's Warbler unmistakably recognized 
by the characters above. The species differs from Audubon’s Warbler only in having a 
white instead of a yellow throat (Compare with Plate LX VI A). Young birds of the latter 
species may be very difficult to separate from the Myrtle, but there is almost always some 
trace of yellow on the throat. When this trace is absent, as occasionally happens, it is 
perhaps impossible to distinguish them as no specific character is absolutely constant. 
Field Marks . The yellow rump is always distinct and bright and makes a most 
conspicuous field mark. The throat being white instead of yellow will, when observed, 
separate the Myrtle from Audubon’s Warbler. 
Nesting. In coniferous trees; in nest of vegetable fibre lined with grasses. 
Distribution. North America except the western states. In Canada, across the 
Dominion and into Alaska, north to the tree limit. Less common in British Columbia 
than farther east. 
SUBSPECIES. The form occupying eastern Canada to Alberta is the Eastern 
Myrtle Warbler (la Fauvette a croupion jaune de 1’Est) Dendroica coronata coronata. The 
northwestern bird from Alaska to the Mackenzie and central British Columbia is Hoover’s 
Warbler (la Fauvette de Hoover) Dendroica coronata hooveri, stated to be slightly larger 
and to have slight colour differences. An early Warbler to arrive in spring and late to 
depart in autumn. 
One of the most conspicuous and most characteristic warblers in migra- 
tion time. Sometimes, especially in the autumn when the majority of 
other small birds have gone, the bushy wastes and weedy roadsides will 
be swarming with Myrtle Warblers, each showing its bright rump spot and 
giving voice to a metallic little cheep in proof of identity as it darts away. 
656. Audubon’s Warbler, la fauvette d’ audubon. Dendroica auduboni. L, 
5-65. Plate LXVI A. Like the Myrtle Warbler, but with a yellow instead of white throat. 
Young birds may not show a completely yellow throat, but it is unusual when some yellow 
is not indicated. 
Distinctions. With its distinctive coloration, especially the contrastive yellow rump, 
mistakable for no other species than the Myrtle Warbler (Compare with Plate LXV B). 
Occasional young birds without the yellow throat are practically indistinguishable from 
that species, but in the majority of specimens enough yellow is suggested for the recogni- 
tion of the species. 
Field Marks. The yellow rump is always distinct and bright and makes a conspicuous 
field mark to separate the species from all others but the Myrtle. Separated from that 
species by yellow instead of white throat. 
Nesting. Usually in coniferous trees. Nest of strips of bark, pine needles, lined with 
fine roots and grasses. 
Distribution. Western North America. In Canada, east to the Alberta foothills, 
occasionally to Saskatchewan, north to central British Columbia. 
SUBSPECIES. The only subspecies formally recognized in Canada is the northern 
one, Dendroica auduboni auduboni. 
A species so like the Myrtle in habits and action as to require no separ- 
ate discussion. 
665. Black- throated Grey Warbler, la fauvette grise A. gorge noire. Den- 
droica nigrescens. L, 5. A striped black and white warbler; male, with solid black throat, 
cheeks, and crown, and a small lemon-yellow spot 
in front of the eye (Figure 441). Females and 
juveniles similar, but duller and lacking black 
throat partly or completely. 
Distinctions. With black and white striping 
to be confused only with the spring Black-poll or 
the Black and W hite Warbler, but not occurring 
within the regular range of either of them. Any 
black and white warbler on the southern coast of 
British Columbia is probably this species. 
Field Marks. A black and white streaked 
warbler with solid black throat, cheeks, and crown. 
Nesting. In low thicket or high pines. Nest 
: of bleached plant fibres lined with feathers. 
Distribution. Western North America. In 
Canada only in southwestern British Columbia, lower Fraser Valley, and adjoining areas. 
Figure 441 
Black-throated Grey Warbler (male) 
natural size. 
