The male courtship call is a mournful whistle. Other sounds include a staccato noise heard during the "forward rush" display, when a male paddles rapidly while crouching low in the water (2,20,43,66,111,145s), and wing whistling (27,34,38,118s).
These recordings were made beside a jetty at Cape May Point, NJ in March.
whistle
whistles (time scale reduced)
forward rush sound
wing whistling (the sounds at 5-6kHz)A second recording of these birds.
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