Costa's Hummingbird - Calypte costae

Song: Male vocalization is an extremely high-pitched thin whirring whistle "siii-siii-siiiiiiiiiiii", may be beyond hearing range of some observers. Call note is a series of dry twittering "tic" notes similar to Bushtit.

Sound: Kevin J. Colver; Jun; UT; Adult; Male; Primary Sound; Courtship display;