The RSPB in the UK don't seem to think that cat predation is a significant factor in bird species decline - https://www.rspb.org.uk/birds-and-wildlife/advice/g

The RSPB in the UK don't seem to think that cat predation is a significant factor in bird species decline - https://www.rspb.org.uk/birds-and-wildlife/advice/gardening-for-wildlife/animal-deterrents/cats-and-garden-birds/are-cats-causing-bird-declines/ https://www.rspb.org.uk/birds-and-wildlife/advice/gardening-... "Those bird species which have undergone the most serious population declines in the UK (such as skylarks, tree sparrows and corn buntings) rarely encounter cats, so cats cannot be causing their declines. Research shows that these declines are usually caused by habitat change or loss, particularly on farmland."