Allen's Hummingbird (Selasphorus sasin) [XC17835]
by Thomas G. Graves from Upper Newport Bay, Orange County, California, United States (call, 'zee-chuppity' call)
Allen's Hummingbird (Selasphorus sasin) [XC361901]
by Paul Marvin from Scorpion Canyon, Santa Cruz Island, CA, United States (flight call, flight display)
Subspecies
Forms a superspecies with Rufous Hummingbird (Selasphorus rufus). "Selasphorus floresii" usually reckoned to be hybrid of present species with Anna's Hummingbird (Calypte anna).
The following 2 subspecies are recognised:
sasin (Lesson, 1829) - Coastal western USA (extreme southern Oregon to California, south to Santa Barbara County). Winters in south-central Mexico.
sedentarius Grinnell, 1929 - Islands off coast of southern California (USA).