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The house finch is a moderate-sized finch, 12.5 to 15 cm (5 to 6 in) long, with a wingspan of 20 to 25 cm (8 to 10 in). Body mass can vary from 16 to 27 g (9 ⁄ 16 to 15 ⁄ 16 oz), with an average weight of 21 g (3 ⁄ 4 oz).
Finches and sparrows are common at feeders this time of year, while owls and bald eagles will soon begin nesting. Now is the time to observe mid-winter birds, from goldfinches to rough-legged ...
Deep cup nest of the great reed-warbler. A bird nest is the spot in which a bird lays and incubates its eggs and raises its young. Although the term popularly refers to a specific structure made by the bird itself—such as the grassy cup nest of the American robin or Eurasian blackbird, or the elaborately woven hanging nest of the Montezuma oropendola or the village weaver—that is too ...
The nest is so tightly woven that it can hold water, and it is possible for nestlings to drown following a rainstorm if the parents do not cover the nest. [ 14 ] The clutch is four to six bluish-white eggs , which are oval in shape and about 16 mm × 12 mm (0.63 in × 0.47 in), roughly the size of a peanut . [ 21 ]
They are mainly fed caterpillars. The nestlings fledge 11–18 days after hatching and disperse. The young birds are then assisted with feeding by both parents for a further three weeks. The parents only very rarely start a second brood, but when they do so it is always in a new nest. [32]
The nest is normally located high in a tree on a horizontal branch with easy access from the air. [18] The male chooses the site of the nest and builds a layer of dry twigs. After a few days, the female takes over. [21] The nest is untidy and is formed of a bulky twig base and a shallow cup lined with roots, grasses and lichens. [22]
Females that are incubating are more likely to remain in her nesting territory. [20] Finches are 3.7 times more likely to travel to the brooding area than any other location. [20] Urbanization in the Galapagos is slowly increasing which directly affects the nesting success of the finches. [21]
Twigs and small sticks are common nesting material. "Birds also like grass clippings, dead leaves, straw, and pine needles," she says. Provide Water Sources.
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