mbling recitation. He sings all day and he sings throughout the
summer, pausing only to sleep or to swallow the caterpillar he hunts
while singing. Patient, persistent mediocrity is expressed by the
Red-eye's song, and only his nasal, petulant call-note, _whang_,
suggests that he is not altogether satisfied with life as he finds it.

The nest, like that of our other Vireos, is a deep cup hung from between
a crotch from 5 to about 40 feet above the ground. The 3-4 eggs, which
are laid in late May, are white spotted with reddish brown.

WARBLING VIREO

_Vireosylva gilva gilva. Case 7, Fig. 29_

Smaller than the Red-eye, without black and white
lines over the brown eye, the underparts faintly
tinged with yellowish. L. 5-3/4.

_Range._ Nests from Louisiana and North Carolina
to Canada; winters in the tropics.

Washington, rather common S.R., Apl. 21-Sept. 12.
Ossining, tolerably common S.R., May 3-Sept. 18.
Cambridge, locally common S.R., May 5-Sept. 15. N.
Ohio, abundant S.R., Apl. 17-Oct. 10. Glen Ellyn,
not common S.R., May 1-Sept. 15. SE. Minn., common
S.R., May 3-Sept. 15.

While the Red-eye's song lasts the greater part of the day, the Warbling
Vireo's continues for only about four seconds, then, after an interval,
it is repeated. It is an unbroken strain running up and down the middle
of the scale and has it in a reminder of the Purple Finch's lay. This
species is less generally distributed than the Red-eye. It may be common
in one locality and absent from another. Its nesting habits and eggs are
much like those of the Red-eye, but the male has the singular custom of
singing while it sits upon the nest.

PHILADELPHIA VIREO

_Vireosylva philadelphicus. Case 7, Fig. 30_

A small, olive-green Vireo, with pale yellow
underparts and a whitish line over the eye. L.

_Range._ Nests from northern New England and
northern Michigan into Canada; winters in the
tropics.

Washington, very rare T.V., May; Sept. Ossining,
rare T.V., Sept. 20-Oct. 20. Cambridge, rare T.V.
Glen Ellyn, rather rare T.V., May 14, 15; Aug.
21-Sept. 30. SE. Minn., uncommon T.V., May 9.

Rarest of our Vireos; but few students know it as a migrant and fewer
still as a nesting bird. Its song and nesting habits resemble those of
the Red-eye.