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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 ...
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).
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)
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 ...
The adult Iago sparrow feeds mainly on the seeds of grass and grain (the main cereal crop grown in Cape Verde is maize), but also on insects and plant shoots. They can do damage to crops by eating young leaves, and like house sparrows will eat the food scraps available near houses.
The grasshopper sparrow (Ammodramus savannarum) is a small New World sparrow. It belongs to the genus Ammodramus , which contains three species that inhabit grasslands and prairies . Grasshopper sparrows are sometimes found in crop fields and they will readily colonize reclaimed grassland.
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Song sparrow in coastal Marin County, California. Adult song sparrows have brown upperparts with dark streaks on the back and are white underneath with dark streaking and a dark brown spot in the middle of the breast. They have a brown cap and a long brown rounded tail. Their face is gray with a brown streak through each eye.