OLIVE-BACKED THRUSH
Hylocichla ustulata swainsoni. [Case 8], Fig. 81
Upperparts uniform olive; eye-ring buff; breast and sides of the throat deeper than in the Gray-cheeked Thrush. L. 7¼.
Range. Nests from northern Michigan and northern New England northward into Canada and southward in the mountains to West Virginia; winters in the tropics.
Washington, common T.V., Apl. 19-June 2; Sept. 2-Nov. 1. Ossining, tolerably common T.V., May 2-30; Sept. 19-Oct. 22. Cambridge, common T.V., May 13-28; Sept. 15-Oct. 5. N. Ohio, common T.V., Apl. 22-June 13; Sept. 2-Oct. 24. Glen Ellyn, common T.V., Apl. 23-June 6; Aug. 16-Oct. 24. SE. Minn., common T.V., May 1-; Sept. 25-.
We know this Thrush chiefly as a migrant when, in the latter part of May, and again in September and October, it passes us en route to and from its northern home. At these seasons we may even hear its whistled puit from the sky as it journeys through the night. "Its song," Dwight says, "lacks the leisurely sweetness of the Hermit Thrush's outpourings, nor is there pause, but in lower key and with greater energy it bubbles on rapidly to a close rather than fading out with the soft melody of its renowned rival."
The Olive-back nests in bushes or low trees, and lays 3-4 greenish blue brown-spotted eggs in June.
HERMIT THRUSH
Hylocichla guttata pallasi. [Case 4], Fig. 77; [Case 5], Fig. 26
Back midway in color between Figs. 77 and 26; the tail noticeably brighter, more rusty. L. 7¼.
Range. Nests from Long Island (locally), the higher parts of Connecticut, and central Minnesota northward to Canada, and southward in the mountains to Maryland; winters from New Jersey and Ohio Valley to the Gulf States and Cuba.
Washington, very common T.V., sometimes not uncommon W.V., Apl. 6-May 17; Sept. 18-Nov. 12. Ossining, common T.V.. Apl. 5-May 9; Oct. 18-Nov. 26. Cambridge, very common T.V., Apl. 15-May 5; Oct. 5-Nov. 15; occasionally one or two may winter; one summer record. N. Ohio, common T.V., Mch. 21-May 10; Oct. 2-28. Glen Ellyn, common T.V., Mch. 18-May 11; Sept. 14-Nov. 1. SE. Minn., common T.V. Apl. 1-; Sept. 13-Oct. 26.