House sparrow tops Big Garden Birdwatch charts for 21st year in a row

Blue tits, starlings, wood pigeons and blackbirds next most sighted in RSPB survey involving 600,000 participants

A friendly if slightly tuneless chirp is the most ubiquitous birdsong in British gardens with the house sparrow topping the Big Garden Birdwatch charts for the 21st consecutive year, according to the annual RSPB survey.

Blue tits, starlings, wood pigeons and blackbirds were the next most-sighted birds by more than 600,000 participants in the world's largest wildlife garden survey.