The House Sparrow (Passer domesticus) is one of humanity's most loyal avian companions, a classic bird of Swedish farmyards and gardens. It measures 14–16 cm long, with a wingspan of around 21–25 cm and a weight of 24–38 grams, and is sturdily built with a thick bill. The male has a grey crown, a reddish-brown nape and cheeks, and a black bib that spreads across the breast over an otherwise grey underside — a bib that actually grows larger during the breeding season as a status signal to rival males. The female is far plainer, streaked brown without a bib but with a clear pale eyebrow stripe, making the sexes easy to tell apart.
House Sparrows are chatty birds, their most familiar sound a persistent "tjilp-tjilp" chatter rather than a true song, filling hedges, roofs and older town quarters with constant murmuring. They are cavity nesters, building a bulky nest of straw and feathers in gaps in buildings, under roof tiles or in nest boxes, where the female lays 3–6 eggs and pairs often manage two to three broods a season. Diet is omnivorous, dominated by seeds, grain and scraps, though insects become crucial for feeding chicks. The species is remarkably sedentary, spending its whole life within a small area and often using the same colony site at a farm for generations. Despite its long history alongside people, the House Sparrow has declined across Sweden and Europe — losing nest cavities in modern, sealed buildings and insect-rich foraging ground in tidied parks and gardens — with the Swedish population estimated at about 451,000 breeding pairs in 2018, a decline felt most sharply in cities.
Read about this species in Swedish →