En bref

• Scientific Name: Passer domesticus
• Spanish Name: Gorrión doméstico
• Family: Passeridae
• Known Nicknames: English sparrow, urban sparrow
• Average Length: 14–18 cm / 5.5–7.1 in
• Average Weight: 24–39.5 g / 0.85–1.39 oz
• Wingspan: 19–25 cm / 7.5–9.8 in
• Key Feature: Male has a black bib and chestnut nape; both sexes have a stout conical bill
• Primary Diet: Primarily Granivore (seeds and grains), also omnivorous (insects, scraps)
• Range: Native to Eurasia and North Africa, now introduced and established on every continent except Antarctica
• Habitat: Highly synanthropic; urban, suburban, and agricultural areas, always near human habitation
• Social Structure: Highly Social; forms large flocks, often with year-round communal roosting
• Nesting/Breeding: Cavities in buildings, nest boxes, dense ivy, or tree holes; builds bulky domed nests of grass and debris
• Statut de conservation : Préoccupation mineure (LC)
• Évolution démographique : En baisse

The House Sparrow (*Passer domesticus*) is a small, stout, and highly adaptable songbird that has become one of the most widespread wild animals on Earth, thriving alongside humans in nearly every urban and agricultural setting. Males are easily recognized by their chestnut-brown back, gray crown and cheeks, and a bold black bib that expands during breeding season, while females and juveniles are a more uniform, drab buffy-brown with a pale eyebrow stripe. A unique characteristic is their remarkable synanthropy—they are almost never found far from human habitation, nesting in building crevices and feeding on scraps, grains, and insects. Special features include a short, conical beak perfectly adapted for cracking seeds, a noisy, chirping social call that forms a constant urban soundtrack, and an extraordinary ability to learn and adapt to new food sources, such as pecking open milk bottles or stealing from bird feeders, showcasing their intelligence and resilience.

Faits amusants

House Sparrows are surprisingly cosmopolitan—they’ve hitched rides with humans to every continent except Antarctica, and urban populations often evolve larger beaks to crack open discarded takeout. A quirky behavior is their “dust bathing”: they fluff up and fling dirt through their feathers to absorb excess oil and dislodge parasites, sometimes doing it in a group like a synchronized spa day. Males also perform a bizarre “begging display” to females, fluttering their wings and chirping like a baby bird, even though they’re fully grown. One unique adaptation: they can digest starch from bread and grains thanks to a duplicated gene for amylase, an enzyme humans also use, making them one of the few birds truly suited to a city diet.

Habitats et répartition

The house sparrow is found across a vast geographical range that originally covered most of Eurasia and North Africa, but it has been successfully introduced by humans to every continent except Antarctica. It inhabits almost exclusively human-modified environments, thriving in urban centers, suburbs, farms, and villages, where it nests in building crevices, eaves, and street signs. This species is rarely found far from human habitation, though it can occupy parkland and agricultural edges if structures are present, and is absent from dense forests, arid deserts without settlements, and high mountain zones.

Comportements & Reproduction

House sparrows are highly social, forming large, noisy flocks that maintain a loose hierarchy, often with dominant males securing better nesting sites and food. Their mating system is predominantly monogamous within a breeding season, though extra-pair copulations are common, with both males and females seeking mates outside the pair bond. Males court females with a distinctive chirping display, puffing up their black bibs (the size of which signals status) and bowing. They are cavity nesters, often using building crevices, and a unique reproductive strategy is their frequent reuse and defense of nests year-round, sometimes raising up to four broods per season. The female incubates the 4-5 eggs for about 11-14 days, while the male helps feed the young, which fledge after another 14-16 days.

Alimentation

The House Sparrow is an opportunistic omnivore with a diet heavily dominated by seeds, particularly those of grains like wheat, oats, and barley, as well as weed seeds and discarded human food. An interesting fact is that their diet shifts dramatically during the breeding season; adults switch to catching soft-bodied insects, such as caterpillars, aphids, and beetles, to feed their rapidly growing chicks, as this protein-rich food is essential for development. They are also highly adaptable foragers, readily consuming bread crumbs, processed scraps from urban areas, and even flower buds and berries when seeds are scarce. Additionally, House Sparrows possess a strong, conical beak perfectly evolved for cracking open hard seed husks, and they often engage in "dust bathing" not for cleaning, but to help remove excess oils from their seed-heavy diet.

Couleurs

The male House Sparrow has a chestnut-brown back with black streaks, a gray crown, black bib, and white cheeks, while the female is a uniform dull brown with a pale buffy eyebrow stripe. Both sexes have a short, stout bill and lack bold patterns, providing effective camouflage in urban and agricultural settings. Unique coloration includes the male’s black bib, which varies in size with social status.

Distribution Map

Places linked to this species. A sighting is never guaranteed.

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