Sparrows

Sparrows (Passeridae)
Finch-like birds; two UK species. They have stout bodies, rounded wings and broad heads, with deep, conical bills adapted for seed-eating. They are social and loosely colonial when breeding. Most nest in cavities but some may nest in bushes or trees, building untidy nests of grass and assorted rubbish. They have no well-developed songs, but several variations on loud chirps and cheeps.