Western Grebe (Aechmophorus occidentalis) [XC527697]
by from Santa Margarita Lake, San Luis Obispo, California, United States (song, rattle)
Western Grebe (Aechmophorus occidentalis) [XC527681]
by Thomas G. Graves from Santa Margarita Lake, San Luis Obispo, California, United States (call, song)
Subspecies
Formerly included Clark's Grebe (Aechmophorus clarkii), which until recently considered a colour morph.
The following 2 subspecies are recognised:
occidentalis (Lawrence, 1858) - South-western and south-central Canada, western and north-central USA. Winters Pacific coast south to Baja California.
ephemeralis Dickerman, 1986 - Central-western and south-central Mexico.