Based on 17,295 research-grade iNaturalist observations in California, Oak Titmouse is most often recorded in May; in California it behaves like a year-round resident. It ranks #66 among birds recorded in the state in our data.
Baeolophus inornatus
Oak Titmouse 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 May

Mallard
House Finch
California Scrub-Jay

California Towhee
Canada Goose

Red-tailed Hawk
Anna's Hummingbird

Western Bluebird
Places to look in California
Botanical GardenThe Huntington Library, Art Museum, and Botanical Gardens
State ParkHearst Castle
Botanical GardenSan Francisco Botanical Garden
Anza-Borrego Desert State Park
Angeles National Forest
National ForestSequoia National Forest
FAQ
When does Oak Titmouse appear in California?
Mainly April–March, with the most records in May.
How common is Oak Titmouse in California?
It ranks #66 by number of iNaturalist observations among birds in California (17,295 records in our sample).