exico and Central America, north to the Mexican border of the
United States.

This species, which is 19 inches long, is wholly black with the
exception of the tail, which is banded. Their nests are built in heavy
woods, and preferably in trees along the bank of a stream. The nest is
of the usual Hawk construction and the two to four eggs are white,
faintly marked with pale chestnut. Data.--Marathon, Texas. Nest of
sticks, lined with weeds and rabbit fur; on a horizontal branch of a
cotton-wood tree, 30 feet up.

[Illustration 213: White.]
[Illustration: 339b--340.]
[Illustration: White,]
[Illustration: right hand margin.]

Page 212

341. SENNETT'S WHITE-TAILED HAWK. _Buteo albicaudatus sennetti._

Range.--Mexican border of the United States and southward.

A large, handsome Hawk which may be identified by its dark upper parts
and white underparts and tail, the flanks and tail being lightly barred
with grayish; the shoulders are chestnut. It is especially abundant in
the southern parts of Texas, where it builds its nests of sticks and
weeds, lined with grasses, leaves and moss. They nest in March and
April, laying two, or rarely three, eggs which are a dull white, and
generally immaculate, but occasionally faintly or sparingly spotted with
brown. Size of eggs 2.25 x 1.80.

342. SWAINSON'S HAWK. _Buteo swainsoni._

Range.--Central and western North America, from the Mississippi Valley
and Hudson Bay, to the Pacific coast, breeding throughout its range.

In the greater part of its range, this is the most abundant of the Hawk
family. Its plumage is extremely variable, showing all the
intergradations from a uniform sooty blackish to the typical adult
plumage of a grayish above, and a white below, with a large breast patch
of rich chestnut. Their nesting habits are as variable as their plumage.
In some localities, they nest exclusively in trees, in others
indifferently upon the ground or rocky ledges. The nest is the usual
Hawk structure of sticks; the eggs are white, variously splashed and
spotted with reddish brown and umber. Size 2.20 x 1.70. Data.--Stark
Co., N. D., May 21, 1897. Nest of sticks, lined with weeds in an ash
tree. Collector, Roy Dodd.

[Illustration 214: Sennett's White-tailed Hawk.]
[Illustration: White.]
[Illustration: Swainson's Hawk.]
[Illustration: left hand margin,]

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343. BROAD-WINGED HAWK. _Buteo platypterus._

Range.--North America, east of the Plains, and from the Bri