Audubon Aquatint, Blue-Green Warbler

AUDUBON, John James (1785 - 1851).
Blue-Green Warbler, Plate 49.
Aquatint engraving with original hand color.
London: Robert Havell, 1827-1838.
38 5/8" x 25 1/2" sheet.
Comparable: Neal Auction Co., 2016 - $2,928; Christie's, 10/15/1982 - $1,210
So scarce is this bird in the Middle Districts, that its discovery in the State of Pennsylvania has been made a matter of much importance. Its habits are consequently very little known, even at the present day, and it would appear that only two individuals have been seen by our American ornithologists, one of which, a young female, has been figured by the Prince of Musignano.
It arrives in the lower parts of the State of Louisiana, in company with many other species of Warblers, breeds there and sets out again about the beginning of October. It is as lively as most species of its genus, possesses the same manner of flight, moves sidewise up and down the branches and twigs, frequently changing sides, and hangs to the extremities of bunches of leaves or berries, on which it procures the insects and larvae of which its food is principally composed. The liveliness of its notes renders it conspicuous in those parts of the skirts of the forests which it frequents; and its song, although neither loud nor of long continuance, is extremely sweet and mellow.