Clark's Grebe (Aechmophorus clarkii) [XC486230]
by Richard E. Webster from Plush, Lake County, Oregon, United States (call)
Clark's Grebe (Aechmophorus clarkii) [XC758994]
by Sue Riffe from Bear River Migratory Bird Refuge, Box Elder County, UT, United States (call, chip, reeee)
Subspecies
Recently separated from Western Grebe (Aechmophorus occidentalis), with which it was formely considered merely a light phase.
The following 2 subspecies are recognised:
clarkii (Lawrence, 1858) - Mexican Plateau from northern Chihuahua to northern Guerrero; Nayarit; (?) L Caballo (New Mexico).
transitionalis Dickerman, 1986 - Western USA, north to Utah and Colorado.