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Orchard Oriole yheer calls (Aug, NJ with juvenile Indigo Bunting)
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Orioles do not call during nocturnal migration.
Bobolinks in flight at dawn, returning to a feeding area from nearby roosts at a site west of Pedricktown along the Delaware River in NJ, where I've counted over a thousand. They stay here during most of September before moving on. Unlike the orioles and meadowlarks, Bobolinks call regularly in flight while migrating at night.
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Two different calls, ju and bink
Bink calls during nocturnal flight (4.00am, Sep, PA).
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The flight call of the Eastern Meadowlark is a rising wee. Bird in flight (Nov, NJ).
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Compare this recording of the lower flight call of a Western Meadowlark (bird in flight, Mar, NE)
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