_Vermivora pinus. Case 7, Fig. 35_
Outer tail-feathers white near the end; two white
wing-bars; female duller than the male.
_Range._ Nests from Missouri and Virginia north to
Minnesota and Connecticut; winters in the tropics.
Washington, rather uncommon T.V., Apl. 26-May 22;
Aug. 13-Sept. 2; a few breed. Ossining, common
S.R., May 4-Sept. 7. N. Ohio, common S.R., Apl.
27-Sept. 15. Glen Ellyn, irregular, possibly
S.R., May 1-Sept. 15. SE. Minn., uncommon S.R.,
Apl. 30-Sept. 1.
In second growths, among birches, and at the border of the woods one may
hear the wheezy, lazy, _swee-chee_ of the Blue-wing. I make it a rule to
see the singer always with the hope that he may prove to be the rare
Brewster's Warbler, which usually sings like the Blue-wing, but in color
is nearer the Golden-wing, being, in fact, like the Golden-wing but with
the underparts and cheeks white unmarked with black. It appears to be a
hybrid between the Blue-wing and Golden-wing. (Case 7, Fig. 38.)
A much rarer supposed hybrid between these two Warblers is known as
Lawrence's Warbler. It is yellow below, like the Blue-wing, but has the
black throat and cheeks of the Golden-wing. Some individuals sing like
the Blue-wing, others like the Golden-wing, and this is true also of
Brewster's Warbler. (Case 7, Fig. 37.)
The Blue-wing nests on the ground, laying 4-5 white delicately speckled
eggs the latter part of May.