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Song sparrows' nests are parasitized by the brown-headed cowbird. The cowbirds' eggs closely resemble song sparrows' eggs, although the cowbirds' eggs are slightly larger. Song sparrows recognize cowbirds as a threat and attack the cowbirds when they are near the nest. There is some evidence that this behavior is learned rather than instinctual ...
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).
The chipping sparrow lays a clutch of two to seven pale blue to white eggs with black, brown, or purple markings. They are about 17 by 12 millimetres (0.67 by 0.47 in), and incubated by the female for 10 to 15 days. [7] The chipping sparrow is often brood parasitized by brown-headed cowbirds, usually resulting in the nest being abandoned. [6]
A newly hatched saltmarsh sparrow and eggs in nest Saltmarsh sparrow chick. Saltmarsh sparrows are non-territorial and have large overlapping home ranges. Male home ranges are twice as large as those of females and may span 50 hectares (120 acres). [22] Saltmarsh sparrows are promiscuous, and the majority of broods exhibit mixed parentage. [23]
The breeding habitat is a variety of open habitats including grasslands and cultivation. Lark sparrows nest on the ground, laying three to six eggs in a grass cup nest sheltered by a clump of grass or other vegetation. The eggs are white with black scrawling. Lark sparrows are occasional victims of brood parasitism by the brown-headed cowbird. [2]
The vesper sparrow (Pooecetes gramineus) is a medium-sized New World sparrow. ... The clutch of 3–5 eggs, usually 4, is incubated by the female for 12–13 days ...
They mainly eat insects in summer with seeds becoming a more important part of the diet at other times of the year. They usually forage in flocks outside of the breeding season, sometimes with other sparrows. The female typically lays three to four eggs (up to five) in a cup nest in low shrubs. Brewer's sparrow has decreased in some parts of ...
The song of the swamp sparrow is a monotone trill, slower than that of the chipping sparrow. A male can have a repertoire of several different trills. The common call note is a loud chip reminiscent of a phoebe.