Based on 18,864 research-grade iNaturalist observations in California, Heermann's Gull is most often recorded in August; in California it behaves like a seasonal. It ranks #57 among birds recorded in the state in our data.
Larus heermanni
Heermann's Gull in California by month
Bars show research-grade observations per month. They mix true seasonality with how often people are outdoors, so treat small numbers with caution.
Also seen in California in August
Western Gull
Great Blue Heron
Red-tailed Hawk
Mallard
Snowy Egret
Anna's Hummingbird
Black Phoebe
House Finch
Places to look in California
Botanical GardenThe Huntington Library, Art Museum, and Botanical Gardens
State ParkHearst Castle
Botanical GardenSan Francisco Botanical Garden
State ParkAnza-Borrego Desert State Park
National ForestAngeles National Forest
National ForestSequoia National Forest
FAQ
When does Heermann's Gull appear in California?
Mainly June–January, with the most records in August.
How common is Heermann's Gull in California?
It ranks #57 by number of iNaturalist observations among birds in California (18,864 records in our sample).