The Nashville has at least two main perch-songs, and a flight-song, all subject to a good deal of variation. It belongs decidedly among the full-voiced Warblers. * * * Its commoner perch-song consists of a string of six or eight or more, lively, rapid notes, suddenly congested into a pleasant, rolling twitter, lower in key than the first part of the song, and about half as long. In the other perch-song, the notes of what correspond to the rolling twitter are separate and richer, and the second part of the song is longer and more noticeable than the first, whose notes are few and slurred, while the whole is more languidly delivered. The differences are hard to describe intelligibly; but in reality they are pronounced and constant. The flight-song, a fairly common performance in late summer, is sung from the height of five to forty feet above the (usually low) tree-tops. It is like the commoner perch-songs, but more hurried, and slightly elaborated, often with a few _chippings_ added, at both ends. Among the Nashville's calls a very small, dry _chip_, and a more metallic, louder _chip_, somewhat Water-Thrush-like, are noteworthy. It also _chippers_ like a young Warbler or a Black-throated Green. Miss Stanwood (1910a) writes: One common song sounds like _'tsin, 'tsin, 'tsee_, another _sweeten, sweeten, 'tsee_, a third, _sillup, sillup, sillup, 'tsee-e-e-e-e-e_. At other times the bird sings but part of the song as _sweeten, sweet_; or _sweeten, 'tsee_; or _sweeta, sweeta, 'tsee_; or recombines them differently as _sweeten, sweeten, sweeten, 'tsee-e-e-e-e-e_. * * * The song is loud, constant, and heard all over the locality, coming principally from the gray birches, but also from the maples, poplars, and evergreens. The bird sings from the tree-tops, but likewise from the middle branches, and I have seen it singing on the ground and just a few inches above it. My last record of its song in 1908 was made the 17th day of July, the first, May the 14th. Between these dates it sang well-nigh incessantly. Knight (1908) says that, while the female is building the nest, "the male bird perches in a nearby sapling and sings leisurely '_pea-cie-pea-cie-hit-i-hit-i-hit_.'" Wilson (1832) thought that the "notes very much resembled the breaking of small dry twigs, or the striking of small pebbles of different sizes smartly against each other for six or seven times, and loud enough to be heard at the distance of thirty or forty yards." Rev. J. H. Langille (1884) writes: "The song of the Nashville Warbler is a composition, the first half of which is as nearly as possible like the thin but penetrating notes of the Black-and-white Creeping Warbler, while the last half is like the twitter of the Chipping Sparrow." He writes it in syllables as "_ke-tsee-ke-tsee-ke-tsee-chipe-ee-chip-ee-chip-ee-chip_."