eddish
brown patch on the back. They nest on the ground in mountainous regions,
concealing the nests in tufts of grass or under logs, stones, etc. The
eggs are creamy or bluish white, specked over the whole surface, but
most numerously about the larger end with reddish brown. Size .75 x .60.
Data.--Custer Co., Colo., June 4, 1897. Slight nest of small rootlets
and fine grass placed under a tuft of grass. Altitude over 8,000 feet.

[Illustration 352: White.]
[Illustration: 570b--571--572.]
[Illustration: White.]
[Illustration: left hand margin.]

Page 351

571. BAIRD'S JUNCO. _Junco bairdi._

Range.--Southern Lower California.

This gray headed species with rusty back and sides is locally confined
to the southern parts of the California peninsula where it is resident.
Its eggs are not likely to differ from those of the Pink-sided Junco
which it most nearly resembles.

567i. TOWNSEND'S JUNCO. _Junco hyemalis townsendi._

Range.--Mountains of northern Lower California; resident and breeding.
Similar to the Pink-sided Junco but duller colored; eggs probably the
same.

572. GUADALUPE JUNCO. _Junco insularis._

Range.--Guadalupe Island off Lower California

Resembles the Pink-sided Junco but is smaller, darker and duller
colored. They are common on the island where they nest in the pine
groves, laying their first sets in February or March. The nests are like
those of the genus and the eggs are greenish white, finely dotted with
reddish brown at the large end. Size .77 x .60.

573. BLACK-THROATED SPARROW. _Amphispiza bilineata bilineata._

Range.--Breeds from central Texas to Kansas; winters in southern Texas
and Mexico.

This species is grayish brown above, with black throat, white
superciliary and line on side of throat. This is a common species that
nests on the ground or at low elevations in bushes, making their nests
of weed stems and grasses. The three to five eggs are bluish white,
unmarked and similar to those of the Bluebird but smaller.
Size .72 x .55.

573a. DESERT SPARROW. _Amphispiza bilineata deserticola._

Range.--Southwestern United States from western Texas to southern
California, and north to Colorado and Nevada; winters in Mexico.

Like the last but paler above. An abundant bird among the foothills and
on plains throughout its range. Found generally in sage brush and
thickets where it nests in bushes or on the ground laying three or four
bluish white eggs like those of the last