breeding from
northern United States northward; winters in
the Gulf States and southward.

These black-throated bluish-backed Warblers
are abundant in swampy woodland both during
migrations and at their breeding grounds; either
sex can readily be identified in any plumage, by
the presence of a small white spot at the base of
the primaries. They nest in underbrush or low
bushes only a few inches above the ground, making
the nests of bark strips, moss rootlets, etc.,
lined with fine grasses or hair;
the eggs are pale buffy white
more or less dotted with pale
brownish; size .65 x .50. Data.--Warren,
Pa., June 9, 1891. 3
eggs. Nest one foot from the
ground in brush; made of fine
pieces of rotten wood, laurel bark and lined with
fine grasses.

654a. CAIRNS WARBLER. _Dendroica caerulescens cairnsi._

Range.--Mountain ranges of North Carolina to Georgia.

A darker form whose habits and eggs are identical with those of the last.

[Illustration 396: Mangrove Warblers. Black-throated Blue Warblers.]
[Illustration: Greenish white.]
[Illustration: Buffy white.]
[Illustration: deco.]
[Illustration: left hand margin.]

Page 395

655. MYRTLE WARBLER. _Dendroica coronata._

Range.--Eastern North America, breeding from northern United States
northward. Winters in the southern half of eastern United States.

This beautiful gray, white and black Warbler can readily be identified
by its yellow rump, side patches and crown patch. It is one of our most
common species during migrations when it is found west to the Rockies
and casually farther. They nest on the lower branches of coniferous
trees, making their homes of rootlets, plant fibres and grasses; during
June or the latter part of May, three or four eggs are laid; they are
white, spotted with several shades of brown and lilac; size .70 x .50.
Data.--Lancaster, N. H., June 7, 1888. Nest in a small spruce, about 6
feet up; made of fine twigs, lined with feathers.

656. AUDUBON'S WARBLER. _Dendroica auduboni auduboni._

Range.--Mountain ranges of western United States from British Columbia
to Mexico.

This bird resembles the last in the location of the yellow patches but
has a yellow instead of a white throat, and is otherwise differently
marked. They are as abundant in suitable localities as are the Myrtle
Warblers in the east, nesting on the outer branches of coniferous trees
at any height from the ground. The nests are made of bark strips,
rootlets, plant fib