Leiothlypis peregrina
Order Passeriformes
Family Parulidae
♂ Adult male.— Top of head ash-gray; rest of upper parts olive-green; under parts white.
♀ Adult female.— Similar, but top of head tinged with greenish; under parts washed with yellowish.
The Tennessee Warbler is a migrant through New York and New England, in May and September; it is usually very rare, though sometimes common in the autumn in the lower Hudson Valley. On migration it frequents apple orchards and tall woodland trees, but in northern New England, where it breeds sparingly, it frequents larch swamps and occasionally spruce growth. On account of its lack of bright colors it is the least likely of the rare warblers to come under the notice of any but an expert field ornithologist. Its song is a series of sharp sits, like a Black-poll’s, but with a decided change to a higher pitch in the middle and a fall at the close. But for the sharp slender bill and the smaller size the bird might pass for a Red-eyed Vireo, until its song betrayed it.
Hoffmann – A Guide to the Birds of New England and Eastern New York (1904)