Most warblers go over the Canada border to nest, but there are many records of the nests of this species in the Alleghanies as far south as Georgia, in the Catskills, in Connecticut, northern Minnesota and Michigan. Laurel thickets and moist undergrowth of woods in the United States, and more commonly pine woods in Canada, are the favorite nesting haunts. A sharp zip, zip, like some midsummer insect's noise, is the bird's call-note, but its love-song, zee, zee, zee, or twee, twea, twea-e-e, as one authority writes it, is only rarely heard in the migrations. It is a languid, drawling little strain, with an upward slide that is easily drowned in the full bird chorus of May.

BLUE AND BLUISH BIRDS

Bluebird
Indigo Bunting
Belted Kingfisher
Blue Jay
Blue Grosbeak
Barn Swallow
Cliff Swallow
Mourning Dove
Blue-gray Gnatcatcher

Look also among Slate-colored Birds in preceding group, particularly among the Warblers there, or in the group of Birds conspicuously, Yellow and Orange.

The Bluebird
(Sialia sialis) Thrush family

Called also: BLUE ROBIN
{Illustration facing p. [95])

Length—7 inches. About an inch longer than the English sparrow.