This morning (9/27/2013) in 25 minutes from the back deck (western Lewis County) from 5:50-6:15 a.m.:
Veery: 4 calls Gray-cheeked Thrush: 12 calls Swainson's Thrush: 35 calls Wood Thrush: 2 calls warblers (unspecified, several different call types): 14 callsThe thrushes mostly seemed to come in clumps of 2-4 calls, so if you divided those call counts by three you'd get my rough guess as to the number of individual birds. The warblerish things mostly seemed to only call once, maybe twice, while within hearing range.
The Gray-cheeked/Swainson's ratio of 1:3 seems surprisingly high to me, given what I see on the ground, but the relationship between birds heard flying over and birds seen two hours later on the ground is loose at best. I heard nocturnal Veery flyovers yesterday and today, but only occasionally actually find one in daylight here in the autumn.
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