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An audio recording of a house sparrow. The house sparrow (Passer domesticus) is a bird of the sparrow family Passeridae, found in most parts of the world. It is a small bird that has a typical length of 16 cm (6.3 in) and a mass of 24–39.5 g (0.85–1.39 oz).
They mainly eat seeds, but also eat insects in the breeding season. They are typically encountered as pairs or family groups in the breeding season, and assemble in flocks for the winter migration. The flight call is a thin seep. [17] Sensu lato, the Savannah sparrow is considered a threatened species by the IUCN.
List of birds of Santa Cruz County, California. The county is in Northern California, located on the California coast, including northern Monterey Bay, and west of the San Francisco Bay and Silicon Valley. It includes the southwestern Santa Cruz Mountains. [1] [2]
The average territory size of rufous-crowned sparrows in the chaparral of California ranges from 2 acres (0.81 ha) to 4 acres (1.6 ha). [11] The density of territories varies by habitat , including 2.5 to 5.8 territories per 99 acres (40 ha) of three- to five-year-old burned chaparral to 3.9 to 6.9 territories for the same amount of coastal ...
Immature birds have brown upperparts and pale brown underparts, and a plain head. Very young birds have a black beak with a pink base. The call is a chip, and the song is a rapid series of call notes chipchipchipchipchipchip. Java sparrows produce distinct trill-calls in different behavioral contexts, according to a study by Furutani et al. (2018).
Lincoln's sparrow at Cosumnes River Preserve in Sacramento County, California. Juveniles strongly resemble juvenile swamp sparrows with a streaky chest and not yet buffy breast, but Lincoln's sparrows rarely have a unicolored crown like the swamp sparrow. [2] Adult measurements: [4] Length: 5.1–5.9 in (13–15 cm) Weight: 0.6–0.7 oz (17–19 g)
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These birds forage on the ground or in low vegetation, but sometimes make short flights to catch flying insects. They mainly eat seeds, other plant parts and insects. In winter, they often forage in flocks. [3] White-crowned sparrows nest either low in bushes or on the ground under shrubs and lay three to five brown-marked gray or greenish-blue ...