Thank you for all the information - now I know what must have had the collared dove in our garden a few weeks ago. I didn't see it, but was relying on a vague description from somebody without her glasses on at the time! As far as sparrows are concerned, I don't know where the idea has come from that their numbers are falling - they sure are thriving where I live. Also blue tits, great tits, chaffinches, greenfinches, blackbirds, song and mistle thrushes, warblers I haven't seen but have heard, wrens, dunnocks, and the odd tree sparrow and reed bunting visiting from the local RSPB reserve. The local cats, I'm pleased to say, don't make much impression...