Knowra Old World sparrow Old World sparrow A small passerine bird in the family Passeridae, native to Europe, Africa, and Asia. It is taxonomically distinct from New World sparrows in the family Passerellidae.
Passeridae : A family of small passerine birds that includes sparrows, snowfinches, and related species. Old World sparrows belong to this family, whose members share their defining taxonomic placement.
House sparrow : A small, widespread sparrow, Passer domesticus, associated with human settlements across much of the world. Its close association with people makes it the most familiar Passeridae species.
Urban ecology : The study of ecological relationships and processes in cities and other urban environments. House sparrows provide a prominent example of birds exploiting urban food and nesting sites.
Bird migration : Regular seasonal movement by birds between breeding areas and regions with different resources. Some Old World sparrows migrate, while many others remain near their breeding grounds.
Passeriformes : The largest order of birds, containing perching birds such as finches, crows, and sparrows. Passeridae is one branch within the order that includes most familiar songbirds.
Eurasian tree sparrow : A sparrow, Passer montanus, native across much of Europe and Asia and introduced elsewhere. It is a widespread relative of the house sparrow, often nesting in cavities.
Invasive species : A species introduced beyond its native range that spreads and causes ecological, economic, or other harm. Introduced house sparrows have established populations beyond their native range, with effects that vary by place.
Birdsong : Vocal sounds produced by birds, often used in communication and frequently associated with courtship or territory. Sparrow calls and songs help individuals communicate and defend territories.
Passerellidae : A family of New World passerine birds commonly called New World sparrows, buntings, and towhees. Despite the shared common name, this separate family is not closely equivalent taxonomically.
Spanish sparrow : A social sparrow, Passer hispaniolensis, breeding around the Mediterranean and in parts of Central Asia. Its large breeding colonies illustrate the varied social behavior of Passeridae.
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