f
the following sub-species and the same description will answer for both.

757. BICKNELL'S THRUSH. _Hylocichla aliciae bicknelli._

Range.--Breeds in the Catskills, White Mountains and Nova Scotia.

These birds, which are practically identical with the preceding, build
their nests at low elevations in trees, usually evergreens when present,
making them of twigs, moss and rootlets, lined with fine grasses. The
eggs, which are laid during May or June, are pale greenish blue, spotted
and blotched with pale brown or russet. Size .88 x .64. Data.--Seal
Island, Nova Scotia, June 3, 1901. Nest of green moss and rootlets, in a
spruce, 5 feet from the ground.

758. RUSSET-BACKED THRUSH. _Hylocichla ustulata ustulata._

Range.--Pacific coast, breeding in Oregon and Alaska; winters in Central
America.

This species is very abundant in moist thickets throughout its range,
nesting in bushes and low trees, and making them of weed

[Illustration 445: Wood Thrush.]
[Illustration: Wilson's Thrush.]
[Illustration: Greenish blue.]
[Illustration: right hand margin.]

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[Illustration 446: WOOD THRUSH.]

Page 445

stalks, bark strips, grasses and moss, lined with fine black rootlets.
They are found at elevations of from two to ten feet above the ground.
Like the Wood Thrush the birds are tame while sitting on the nest and
will allow a very close approach, without taking alarm; nests are
frequently found which are made almost entirely out of green moss and
are very handsome structures. Their three to five eggs are laid in May
or June; they are greenish blue, spotted with brown of varying shades.
Size .92 x .65. Data.--Eureka, California, July 6, 1899. Nest in a fir
tree, 5 feet from the ground; made of moss and strips of redwood bark. 4
eggs.

758a. OLIVE-BACKED THRUSH. _Hylocichla swainsoni._

Range.--Eastern North America, breeding chiefly north of the United
States, but locally in the northern parts, and abundantly in mountain
ranges.

The nesting habits and eggs of this eastern representative of the last
species are like those of that bird in all respects and the eggs cannot
be distinguished from those of _ustulatus_.

758b. OLIVE-BACKED THRUSH. _Hylocichla oedica_.

Range.--California and southern Oregon.

Nesting habits and eggs identical with those of _ustulatus._

759. ALASKA HERMIT THRUSH. _Hylocichla guttata guttata._

Range.--Pacific coast from British Columbia to Alaska. Winters in
Mex