CA Bird Identification: Common California Birds

To identify a bird in California, start with the year-round yard birds, because a handful of them account for most first sightings. Audubon California counts over 600 species recorded in the state and about 450 seen commonly, but the San Fernando Valley Audubon backyard guide and the Santa Clara Valley Bird Alliance's backyard bird list both feature the same short group. Sizes and marks below are from Audubon's field guide:

• California Scrub-Jay: 11-13 in. Blue head, wings and tail with a gray back, and a white throat bordered by a streaked necklace. Buries acorns. It was split from Woodhouse's Scrub-Jay as a separate species in July 2016.
• California Towhee: 8.3-9.8 in. Plain dusty brown, buffy under the tail and on the throat, with fine streaks around the throat. Scratches in leaf litter under shrubs and may attack its own reflection in a window.
• Spotted Towhee: about 8.25 in. Black hood and back (gray on some females) with bold white spots on back, wings and tail corners, and rusty sides; often heard scratching in leaf litter first.
• Black Phoebe: 6.3-7.1 in. Charcoal gray, blacker on the head, with a white belly; perches upright and dips its tail. Rarely far from water, because it builds mud nests on eaves and walls.
• Anna's Hummingbird: about 4 in. Males have rose-red on the throat and crown that can look black or gold; females are green above and dingy gray below. Holds its tail still while hovering and stays all year on the Pacific Coast.
• Lesser Goldfinch: 3.5-4.3 in. White patches in the wing and tail; males in California are the green-backed form.
• Oak Titmouse: 5-6 in. Plain gray-brown with a short crest; hangs upside down in oaks and visits feeders.
• Acorn Woodpecker: 8.3-9.1 in. Black above and on the chest, red cap, strong face pattern and white eyes. Groups store acorns in granary trees that can hold up to 50,000 holes.
• California Quail: 9.4-10.6 in. A curving topknot, white stripes on gray-brown sides and a scaled belly; walks in coveys and calls Chi-ca-go.
• White-crowned Sparrow: 5.9-6.3 in. Bold black and white head stripes and a plain gray breast; some coastal birds stay all year, others arrive for winter.

The widespread birds, including House Finch, Mourning Dove, American Robin, Dark-eyed Junco and Northern Mockingbird, are on the backyard birds page.

Most wrong IDs in California come from a handful of pairs. These are the checks Audubon gives:

• California Scrub-Jay vs Steller's Jay: the scrub-jay is blue and gray with a white throat; Steller's Jay, 12-13.5 in, is the only all-dark jay with a crest and lives mainly in conifer and pine-oak forest.
• California Towhee vs Canyon Towhee: they look alike; voice and range are the main differences.
• Yellow-billed vs Black-billed Magpie: look at the bill. The Yellow-billed Magpie has a bright yellow bill and variable yellow skin around the eye, and lives only in California, in a range about 500 miles long and less than 150 miles wide.
• California Quail vs Gambel's Quail and Mountain Quail: in the deserts, Gambel's Quail is the confusion species; at higher elevations it is Mountain Quail, which has different markings.
• Anna's vs Costa's and Black-chinned Hummingbirds: Anna's is stockier and holds its tail still while hovering.
• White-crowned vs White-throated Sparrow: check for the white throat patch, which White-crowned lacks.
• Crow vs raven: see the crows in backyard page; the SFV Audubon guide lists both among common valley birds.

California is too large for one list. The SFV Audubon guide for the San Fernando Valley splits its birds into three groups: common year-round birds, uncommon but not rare birds, and seasonal visitors to Southern California, which include orioles, Yellow-rumped Warbler, Ruby-crowned Kinglet and White-crowned Sparrow.

In the Central Valley, Sacramento Audubon's gallery shows 269 species arranged by family, including 31 geese, swans and ducks and 21 sandpipers and allies, a reminder of how much of California birding happens on water. Audubon California describes the state as a critical link on the Pacific Flyway, used by millions of migrating birds each year, so spring and fall bring birds that a summer yard list will not show.

In the far north of the state, the species overlap with Oregon; the Northwest birds page covers that region.

A photo is often enough. Get the bird side-on with the bill and tail in the frame, and note where you saw it (yard, oak woodland, water) because habitat narrows California's list quickly. BirdLens identifies the bird from the picture; then check the marks above for the look-alike pair. If the bird is on water or a shoreline, the duck and raptor guide and the shorebird page are the next step.

Research and drafting for this page were assisted by AI and checked line by line against the sources listed below. If you find an error, tell us and we will correct it.