Western Grebe (Aechmophorus occidentalis) [XC355263]
by id from Hope Lake, Glacier County, Montana, United States (begging call)
Western Grebe (Aechmophorus occidentalis) [XC565879]
by Bruce Lagerquist from Bear River Migratory Bird Refuge, Box Elder County, UT, United States (call, interaction calls)
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.