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presumed American Tree Sparrow nocturnal flight calls

Fig.5. New York November 6, 1989 (WRE).

Fig.6. New York November 6, 1989 (WRE).

Fig.7. New York November 6, 1989 (WRE).

Nocturnal flight call sequence:

1. New York November 7, 1989 (WRE).