Found in brushy, scrubby, and pine-oak habitats. Blue head/wings/tail, white above eye, grayish underparts with streaked throat. Bulky nest; omnivorous diet.

Found in chaparral and riparian woodland with dense understory. Noticeably decurved bill, dark brownish-gray upperparts, whitish throat, dark moustache and eye.

Found in brushy, riparian, and chaparral habitats. Brownish with rufous undertail coverts, grayish-buff underparts, necklace of brown throat marks. Mostly eats seeds and fruit.

Uncommon spring visitor; smallest U.S. hummingbird. Male has purplish rays on white throat, short bill. Female's wing extends beyond her shorter tail at rest.

Found along forest edge and open woodlands, near fruiting trees in migration/winter. Yellowish belly, white undertail coverts, conspicuous crest. Eats fruit and insects.

Small acrobatic bird often in mixed flocks. Chickadee-style black cap, black bib, white cheeks. Back and rump are chestnut colored.

Found in open woodlands and forest edge. Dark bill, reddish crown, black eye line, white eyebrow, unstreaked breast. Feeds mostly on seeds; some insects in breeding season.

Found in open areas near water, especially bridges and buildings. Square-cut tail, buffy orange rump and forehead. Compare to Barn Swallow.

Common Poorwill: found in chaparral, oak woodlands, and rocky outcrops. Nocturnal; hibernates in winter. Cryptic plumage, large head, wide mouth. Eats moths and beetles; known "poor-will" call.

Found near cliffs and mountains, often seen flying overhead. Black overall, large bill, low guttural croak. Wedge-shaped tail, tends to soar (unlike American Crow).

Found in wooded areas with open country. Medium Accipiter with rounded wings, long narrow tail. Females larger than males. Feeds on birds, mammals, reptiles.

Found in open woodlands, fields, and residential areas. Pink bill, white belly, white outer tail feathers. Coloration varies by subspecies. Song similar to Chipping Sparrow.

Found in open woodlands, fields, and residential areas. Pink bill, white belly, white outer tail feathers. Coloration varies by subspecies. Song similar to Chipping Sparrow.

Eurasian native, rapidly spreading. Black band on hind neck, grayish tail coverts, three-toned wing pattern in flight.

Found near human habitation. Breeding: iridescent black/purple, dark wings, yellow bill. Winter: speckled, duller bill. Nests in cavities; may mimic other birds.

Found in hedgerows, chaparral, and forest undergrowth. Large brownish sparrow, more heavily streaked than Song Sparrow. Two-toned bill; rufous wash in wings/tail.

Found in hedgerows, chaparral, and forest undergrowth. Large brownish sparrow, more heavily streaked than Song Sparrow. Two-toned bill; rufous wash in wings/tail.

Large, majestic soarer with flat wings, uniformly dark body, slight white at tail base, buffy gold nape.

Large owl with conspicuous ear tufts, found in varied forest habitats. 5-8 note call, chestnut facial disk, yellow eyes, barred underparts. Diverse diet of small mammals.

Large owl with conspicuous ear tufts, found in varied forest habitats. 5-8 note call, chestnut facial disk, yellow eyes, barred underparts. Diverse diet of small mammals.

Found in deciduous/coniferous forests with larger trees than Downy Woodpecker prefers. White back stripe, all-white outer tail feathers, longer bill, non-descending call.

Empidonax Flycatcher with light eye-rings, two pale wing bars. Less yellowish than Pacific-slope Flycatcher; shorter, darker bill, teardrop-shaped eye ring.

Found on woodland trails and in chaparral, especially in migration/winter. Olive-brown back contrasts with rufous tail, which is raised and lowered. Compare Swainson's Thrush.

Hermit Warbler passes through Mount Diablo woodlands during migration (spring-fall) en route to/from Mexico. About 5.5" long, 7.5" wingspan.

Tiny "horns" and black, white, pale-yellow face pattern above a black collar. Mostly black tail underneath. Juveniles streaked, less distinctive.