Loads of Europe's birds are under threat from the damage we are doing to our environment, experts have warned.
A report called Birds In Europe says 43% of the continent's bird species are in danger from climate change, farming methods or building projects.
Conservationists fear that some of the species may die out completely.
British birds at risk include the house sparrow, starling, wood warbler and corn bunting. The report was the first survey of its kind for 10 years.
It showed an increase in the number of threatened species, which experts described as "deeply worrying".
But there was some good news - some of Europe's most endangered birds are recovering thanks to conservation schemes.
They include the white-tailed eagle and the Eurasian griffon.