_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.