Pet cats blamed for millions of bird deaths as experts clash over impact on wildlife

Campaigners warn domestic cats are killing vast numbers of birds in Canada and the UK, with estimates ranging from 100m a year in Canada to 27–55m birds in Britain

Campaigners warn domestic cats are killing vast numbers of birds in Canada and the UK, with estimates ranging from 100m a year in Canada to 27–55m birds in Britain

Campaigners warn domestic cats are killing vast numbers of birds in Canada and the UK, with estimates ranging from 100m a year in Canada to 27–55m birds in Britain