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The House Sparrow (Passer domesticus) occurs naturally in most of Europe and Asia, though it is replaced by allied forms in some areas; it has also followed humans all over the world and has been intentionally or accidentally introduced to most of North America and Australia as well as urban areas in other parts of the World.

Wherever people build, House Sparrows sooner or later come to share their abodes. Though described as tame and semi-domestic, neither is strictly true; humans, in the Sparrow's eye, provide food and home, not companionship. The House Sparrow remains suspicious and resents familiarity.

The 14-16 cm long House Sparrow is abundant but not universally common; in many hilly districts it is scarce. In cities, towns and villages, even round isolated farms, it can be the most abundant bird. In parking lots, it is ubiquitous.

So familiar a bird needs little description, yet it is often confused with the smaller and slimmer Tree Sparrow, which, however, has a coppery and not grey crown, two distinct wing bars, and a black patch on the cheeks.

The House Sparrow’s bill in summer is blue-black, the legs brown. When clean, the cock Sparrow is an exceedingly handsome bird. In winter the plumage is dulled by pale edgings, and the bill is yellowish brown. The female has no black on head nor throat, nor a grey crown; her upper parts are streaked with brown.

The young are deeper brown, and the white is replaced by buff; the beak is dull yellow.

It is gregarious at all seasons in its nesting colonies, autumnal raids and communal roosts.

Although its young are fed on larvae of insects—often destructive species—no sooner can they fly than they are led to the fields, where grain is devoured and as much wasted.

In spring flowers, especially yellow blossoms, are attacked and torn to bits; crocuses, primroseThe primrose is any of over 500 species of low-growing herbs of the genus Primula family Primulaceae''. Some species are grown for their ornamental flowers. This genus includes cowslips. Perennial primroses bloom during the spring; their flowers can be pus and aconites seem to attract the House Sparrow most. The bird will also hunt butterfliesFor other uses of the term "butterfly", see butterfly (disambiguation). Superfamily Hesperioidea: Hesperiidae Superfamily Papilionoidea: Papilionidae Pieridae Nymphalidae Lycaenidae Riodinidae Libytheidae Lyceanidae A butterfly is a flying insect of the o.

The short and incessant chirp needs no description, and its double note "phillip" which originated the now obsolete popular name of Phillip Sparrow, is as familiar.

Whilst the young are in their nests, the old birds utter a long parental "churr”. At least three broods are reared in the season.

The nesting site is varied; under eaves, in holes in masonry or rocks, in ivy or creepers on houses or banks, on the sea-cliffs, or in bushes in bays and inlets. When built in holes or ivy the nest is an untidy litter of straw and rubbish, abundantly filled with feathers. Large, well-constructed domed nests are often built when the bird nests in trees or shrubs, especially rural areas.

The House Sparrow is quite aggressive in usurping the nesting sites of other birds, often forcibly evicting the previous occupants, and sometimes even building a new nest directly on top of another active nest with live nestlings. House MartinHouse Martin : Animalia : Chordata : Aves : Passeriformes : Hirundinidae Delichon urbica Binomial name Delichon urbica Linnaeus, 1758) The House Martin Delichon urbica is a migratory passerine of the family Hiruninidae. The European range of the House Mars and Sand MartinSand Martin US NPS Photo by Joshua Nielsen : Animalia : Chordata : Aves : Passeriformes : Hirundinidae Riparia riparia Binomial name Riparia riparia Linnaeus, 1758) The Sand Martin Riparia riparia is a migratory passerine bird in the swallow family. It has are especially susceptible to this behavior.

Five to six eggs, profusely dusted, speckled or blotched with black, brown or ash-grey on a blue-tinted or creamy white ground, are usual types of the very variable eggs. They are variable in size and shape as well as markings. Eggs are incubated by the female.