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The house finch may be infected by several parasites including Plasmodium relictum [23] and Mycoplasma gallisepticum, which caused the population of house finches in eastern North America to crash during the 1990s. [24] The mite Pellonyssus reedi is often found on house finch nestlings, particularly for nests later in the season. [25]
Many kinds of birds are known to congregate in groups of varying size; a congregation of nesting birds is called a breeding colony. A group of birds congregating for rest is called a communal roost. Approximately 13% of all bird species nest colonially. [110] Nesting colonies are very common among seabirds on cliffs and islands.
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.
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 ...
Passer ahasvar Kleinschmidt, 1904. 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). Females and young birds are coloured pale brown and grey, and males have brighter black ...
Nightjars are medium-sized nocturnal birds that usually nest on the ground. They have long wings, short legs, and very short bills. Most have small feet, of little use for walking, and long pointed wings. Their soft plumage is cryptically colored to resemble bark or leaves. Three species have been recorded in Montana. Common nighthawk ...
The medium ground finch ( Geospiza fortis) is a species of bird in the family Thraupidae. It is endemic to the Galapagos Islands. Its primary natural habitat is tropical shrubland. One of Darwin's finches, the species was the first which scientists have observed evolving in real-time. Many studies and research have been conducted on medium ...
These birds mainly eat terrestrial arthropods and snails, and also include fruit [17] in their diet during winter. [2] The nest, referred to as the "oven" (which gives the bird its name), is a domed structure placed on the ground, woven from vegetation, and containing a side entrance. The female usually lays 4-5 eggs speckled with brown or gray.