Range.—Central Texas southward into Mexico.
BLACK-THROATED GREEN WARBLER 667. Dendroica virens. 5 inches
Throat black; two wing bars and outer tail feathers white; female with little black on the throat.
A common bird in pine groves in northern United States, or during migrations in birch woods. I have found them most abundant on side hills covered with low-growth pines. They seem to be very nervous and are greatly excited if you appear near their nests. They often have the habit of building several nests, whether with the deliberate intent to deceive or whether because the first was not satisfactory as to location is not known.
Song.—Entirely different from that of any other bird; a rather harsh “zee” repeated six times, with the fourth and fifth syllables lower.
Nest.—Of rootlets and fine grasses, lined with hair; placed high up in pine trees; eggs white with fine brown specks around the large end (.60 × .50).
Range.—Eastern North America, breeding from southern New England and Illinois north to Nova Scotia and Hudson Bay; winters in Central America.
KIRTLAND WARBLER 670. Dendroica kirtlandi. 5½ inches
Above bluish gray streaked with black; underparts pale yellow streaked on the side with black.
This is one of the rarest of American Warblers, and until 1903 but little was known of their habits or range; in that year they were discovered nesting in Oscoda County, Michigan. They were found near the banks of a river in Jack pines, building on the ground and remaining in the underbrush near it.
Song.—Loud and clear and said to resemble that of the Maryland Yellow-throat.
Nest.—In depressions in the ground at the foot of pine trees and probably also under bushes; made of strips of bark and vegetable fibres; eggs white, wreathed about the large end with brown (.72 × .56).
Range.—Breeds in Michigan and migrates southeast through Ohio, Missouri, Tennessee, Virginia, the Carolinas and Florida to the Bahamas.
PINE WARBLER 671. Dendroica vigorsi. 5½ inches
Greenish yellow above, brighter below; two white wing bars and white spots on outer tail feathers; female, duller and grayer.
Found only in tracts of coniferous trees, except during migrations, when they are often in company with other kinds of Warblers. They like dry hillsides covered with scrub pines and are often quite abundant in such localities. They are rather quiet in their manners, creeping about among the tree tops like Black and White Warblers and occasionally giving their clear little trill.
