Sept (II)
25.
Nest, pensile, of grasses and plant fibers, firmly and smoothly interwoven, lined with fine grasses, suspended from a forked branch eight to forty feet up. Eggs, three to four, white, with a few specks or spots of black, umber, or rufous-brown, chiefly about the larger end, 76 x 55. Unlike its cousin, the Preacher, the Warbling Vireo is not generally distributed, but shows a decided preference for rows of shade trees, particularly rows of elms. It passes the greater part of its time in the upper branches, and is more often heard than seen. Although resembling the Red-eye in general appearance, its song is so different that singing birds need never be mistaken for that species. Instead of the Red-eye's broken, rambling recitative, the song of the Warbling Vireo is a firm, rich, continuous warble with a singu- 'lar alto undertone.
Ad.- 628. Vireo flavifrons Vieill. YELLOW-THROATED VIREO. Upper parts bright olive-green, changing to gray on the rump and upper tailcoverts; greater and middle wing-coverts tipped with white, forming two distinct wing-bars; outer web of inner secondaries white; eye-ring, throat, and breast bright yellow; belly white. L., 5.95; W., 3-05; T., 2·10; B. from N., 36.