For 40 years amateur birdwatchers have charted the dramatic changes in the Big Garden Birdwatch, run by conservation charity the RSPB.
The wildlife survey, which began in 1979, has charted how birds such as the song thrush and greenfinch have been overtaken by the woodpigeon and long-tailed tit.
As it returns this weekend, the RSPB has revealed the winners and the losers of the UK’s changing bird population.

Big Garden Bird Watch , Winners and Losers