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.
