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Description[edit] 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).
Audubon's illustration of nesting house wrens. The nesting habits do not seem to differ significantly between the northern and southern house wrens. They usually construct a large cup nest in various sorts of cavities, taking about a week to build. The nest is made from small dry sticks and is usually lined with a variety of different materials.
Western house martin. The western house martin ( Delichon urbicum ), sometimes called the common house martin, northern house martin or, particularly in Europe, just house martin, is a migratory passerine bird of the swallow family which breeds in Europe, north Africa and across the Palearctic; and winters in sub-Saharan Africa and tropical Asia.
The nest typically takes three to nine days to build; the finished product is 5.1–7.6 cm (2.0–3.0 in) tall, 10.1 cm (4.0 in) across, with an inner diameter of about 7.6 cm (3.0 in). Cardinals do not usually use their nests more than once.
The American goldfinch ( Spinus tristis) is a small North American bird in the finch family. It is migratory, ranging from mid- Alberta to North Carolina during the breeding season, and from just south of the Canada–United States border to Mexico during the winter. The only finch in its subfamily to undergo a complete molt, the American ...
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 ...
The chimney swift's genus name, Chaetura, is a combination of two Ancient Greek words: chaite, which means "bristle" or "spine", and oura which means "tail". This is an apt description of the bird's tail, as the shafts of all ten tail feathers ( rectrices) end in sharp, protruding points. [10] The specific name pelagica is derived from the ...
The northern mockingbird ( Mimus polyglottos) is a mockingbird commonly found in North America, of the family Mimidae. The species is also found in some parts of the Caribbean, as well as on the Hawaiian Islands, and has rarely been observed in Europe. It is typically a permanent resident across much of its range, but northern mockingbirds may ...