Its louder note is at about 4 kHz, part of a "Whinny," with harmonics and a lower note at 2 kHz. Its call could be interpreted as aggressive, and the chickadees' as alarm notes.
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Both sexes give a shrill, chattering call that can last 4 seconds. It's used in courtship as well as aggressive situations.
Copulation Chutter (Chrrr). Given by male indicating desire to copulate, occasionally by female. Nonresidents give this call when approaching resident female.
Listen to Merlin on bird-sounds.net - a comprehensive collection of North American bird songs and bird calls.
Merlin / Falco columbarius bird sounds free download.
High, loud cackle, also klee-klee-klee like an American Kestrel, but usually silent. Call Pattern. Falling, Flat, Simple. Call Type. Scream. Audio © Lang ...