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Sparrow (genus Passer) — Old World passerine birds

Small, social Old World passerine birds of the genus Passer (family Passeridae). Includes the familiar house sparrow; often found near people, feeding on seeds and insects; conservation status varies by species.

Author: Leandro Alegsa Creation date: November 13, 2022 Last updated: May 10, 2026

simple.wikipedia.org · CC BY-SA 3.0

Overview

Sparrows are small, often stocky songbirds typically placed in the genus Passer. They are classic passerine (perching) birds within the family Passeridae, commonly known as Old World sparrows. Many species have adapted to environments altered by people and are among the most familiar wild birds in urban, agricultural and open-country landscapes.

Appearance and behavior

Members of the genus generally have stout bodies, short rounded wings and strong, conical bills suited to cracking seeds. Plumage is usually a combination of browns, greys and streaking that provides camouflage in grassland and built environments. Sparrows are often gregarious: outside the breeding season they may form flocks, forage together on the ground, and engage in social roosting. Their diet is predominantly granivorous but is supplemented with insects, particularly when feeding young.

Habitat and nesting

Sparrows occupy a wide range of habitats, from farmland and scrub to towns and cities. Many species readily nest near houses and on buildings, using cavities, eaves, crevices and nest boxes. Nests are typically constructed from grasses, feathers and other soft materials; some species will take over existing cavities or use dense vegetation for concealment. Their close association with people has allowed several species to extend their ranges beyond their original distributions.

Species, distribution and taxonomy

The genus contains about thirty species distributed across Europe, Asia and parts of Africa. The best known is the house sparrow, Passer domesticus, a species that has been introduced to many regions worldwide. Related groups sometimes discussed alongside Passer include rock sparrows and snowfinches; some authorities treat genera such as Petronia, Carpospiza and Montifringilla as distinct but closely related. Taxonomic limits and relationships among these small, finch-like birds have been revised as new morphological and genetic data become available.

Relationship with people and conservation

Sparrows have a long cultural association with human settlements and agriculture and appear in literature, proverbs and folklore. While several species remain common and widespread, others have experienced declines in parts of their ranges, often linked to changes in farming practices, loss of nesting sites and reductions in insect prey during the breeding season. Conservation status therefore varies by species and region, and measures such as habitat management, provision of nesting sites and ecological research can help support vulnerable populations.

Notable distinctions

Old World vs New World "sparrows": not all birds called sparrows are closely related; Old World sparrows (Passeridae) differ from several New World species placed in other families.
Adaptability: many Passer species thrive in human-modified landscapes, but responses to urbanization and agricultural intensification differ among species.
Research and monitoring: ongoing studies of behavior, genetics and population trends continue to refine understanding of sparrow diversity and conservation needs.

Distribution of Passer domesticus, dark green = natural or original distribution, light green = secondary distribution.

Appearance

Sparrows are small songbirds that typically reach a body length between 10 and 20 centimeters. They are compactly built birds with a large head relative to body size and a short, strong bill that tapers to a point at the front. In some species, the bill color changes from horned to black during the breeding season. The tail is relatively short in most species and either ends in a straight line or is somewhat notched, always consisting of twelve control feathers.

The plumage is brown, grey or reddish-brown in most species. Only a few species also have yellow or white plumage. In some species there is a pronounced sexual dimorphism, but in other species there is no sex-specific difference in plumage colouration. Young birds resemble the adult female.

Adult sparrows undergo a full moult once a year, starting after the last brood. Young birds moult within the first month after they have fledged.

Habitat and way of life

Sparrows prefer open, dry or semi-arid regions as habitat. They also occur in savannahs, scrublands and deserts. They are also found in sparse forests as well as on agricultural land and in or near human settlements. Some species, such as the house sparrow, live in close proximity to humans and are also found in the inner city areas of larger towns.

Most sparrow species nest in loose colonies, with only a few species breeding singly. Colonies can be very large: In Morocco in the 1950s, a breeding colony of the willow sparrow was observed to have about 125,000 nests on 60 hectares. This included up to 50 nests in a single tree. However, reports of breeding colonies of such size are the exception: it was not until the 1980s that a breeding colony of willow sparrows with 4,678 nests was counted again in Algeria. At that time, a total of 35,000 pairs of willow sparrows were breeding in 13 colonies in an area covering 40,000 square kilometres. This meant that there were 0.9 breeding pairs per square kilometre.

Sparrows are usually monogamous, a few species enter into a pair relationship that lasts as long as both partners are alive. Regardless of the location of the nest, it is in principle always a spherical nest with a lateral entrance. The nest is usually not built very carefully, the nesting material, which is not worked on the outside, usually hangs down loosely. Some species also use abandoned nests of other bird species. Both parent birds breed and are involved in rearing the young.

The sparrows have a very distinct hierarchy within their colonies. This is determined by the size of their characteristic dark bibs; the larger and darker the bib, the higher the rank of the bird within its colony.

Sparrows often engage in an interesting form of plumage care called dust bathing or sand bathing. To do this, they squat in a hollow of dry sand and dust and display a conspicuous behaviour in it, in which the body is pressed to the ground and then moved briskly back and forth. This is a hygienic behaviour with the aim of getting rid of parasites in the plumage, such as feather mites.

Questions and Answers

Q: What is a sparrow?

A: A sparrow is a member of the genus Passer, which are small passerine birds that belong to the family Passeridae.

Q: Where do sparrows often make their nests?

A: Sparrows often make their nests near houses or buildings, making them one of the easiest birds to see in the wild.

Q: How many species of sparrow are there around the world?

A: There are about 30 species of sparrow around the world.

Q: What is the best known species of sparrow?

A: The best known species of sparrow is the house sparrow, Passer domesticus.

Q: Are there any other genera that are sometimes considered part of the sparrow group?

A: Yes, some authorities place other genera in the sparrow group such as Petronia (rock sparrows), Carpospiza (pale rockfinch), and Montifringilla (snowfinches).

Author

AlegsaOnline.com - Sparrow - Leandro Alegsa

Creation date: November 13, 2022
Last updated: May 10, 2026

URL: https://en.alegsaonline.com/art/92503