hable
from those of that species.

626. PHILADELPHIA VIREO. _Vireosylva philadelphica_.

Range.--Eastern United States breeding from northern New England and
Manitoba northward.

This species is much smaller than the Red-eye (length 5 in.) and is
yellowish below, and without black edges to the gray crown. Their eggs
do not differ from those of the Red-eyed Vireo except in size, averaging
.70 x .50.

627. WARBLING VIREO. _Vireosylva gilva gilva._

Range.--North America east to the Plains, breeding north to Labrador.

This Vireo is nearly as abundant as the Red-eye but is not generally as
well known, probably because it is usually higher in the trees and more
concealed from view. Their nests are like those of the Red-eye, but
smaller and usually placed higher in the trees. The birds are even more
persistent singers, than are the latter but the song is more musical and
delivered in a more even manner, as they creep about among the foliage,
peering under every leaf for lurking insects. The eggs are pure white,
spotted with brown or reddish brown. Size .72 x .52.

[Illustration 382: Red-eyed Vireo.]
[Illustration: White.]
[Illustration: White.]
[Illustration: White.]
[Illustration: 626-627.]
[Illustration: left hand margin.]

Page 381

[Illustration 383: C. A. Reed.
RED-EYED VIREO ON NEST.]

Page 382

627a. WESTERN WARBLING VIREO. _Vireosylva gilva swainsoni._

Range.--Western United States, breeding from Mexico to British Columbia.

This species is like the last but said to be a trifle smaller and paler
color. Its nesting habits and eggs are precisely like those of the
eastern form.

628. YELLOW-THROATED VIREO. _Lanivireo flavifrons._

Range.--United States east of the Plains, breeding from the Gulf to
Manitoba and New Brunswick.

This handsome bird is wholly unlike any others of the Vireos, having a
bright yellow throat and breast; the upper parts are greenish and the
wings and tail gray, the latter with two white bars. They are fairly
common breeding birds in northern United States, placing their handsome
basket-like structures in forks of branches and at any elevation from
the ground; the nests are like those of the preceding Vireos but are
frequently adorned on the outside with lichens, thereby adding
materially to their natural beauty. The four or five eggs are pinkish or
creamy white, speckled about the large end with reddish brown. Size .80
x .60.

629. BLUE-HEADED VIREO. _Lanivireo