Friday, September 21

Nocturnal migrants September 20th 2012

A few highlights from the night of September 20th, which had light north to north-easterly winds. Recordings made just north of Philadelphia, PA.
Dickcissel (3.06am).















A reasonable candidate for a Bicknell's Thrush flight call (4.32am)
















Black-billed Cuckoo (3.46am)















Probable Rose-breasted Grosbeak, a species with a variety of nocturnal calls (4.32am)
















Three different warbler buzzes:
Common Yellowthroat, a low electric, insect-like buzz (2.41am)
















Chestnut-sided Warbler, a fine buzz (5.18am)
















Several warbler species make this higher buzzy call: Blackpoll, Yellow, Connecticut, and Blackburnian (4.18am).


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