Western Gull (Larus occidentalis) [XC742019]
by Andrew Spencer from MacArthur Park Lake (near Los Angeles), Los Angeles County, California, United States (begging call)
Western Gull (Larus occidentalis) [XC383346]
by Thomas G. Graves from Cayucos, San Luis Obispo County, California, United States (call)
Subspecies
Interbreeds freely with Glaucous-winged Gull (Larus glaucescens) at northern end of range.
The following 2 subspecies are recognised:
occidentalis Audubon, 1839 - North-western Washington (Destruction I) to central California (Farallon Is).
wymani Dickey & van Rossem, 1925 - Central California (Monterey Bay) to central Baja California (Guadalupe I).