The British Trust for Ornithology has tagged some British cuckoos to find out where they move to on migration. Their website www.bto.org allows you to see the movements of each tagged individual. One, named David, has just turned up in Sudan! The bird was originally tagged in Ceredigion in West Wales. My regular birding companion Terry, who is from Ceredigion, will be interested to know that he has been followed here. I am a little surprised that these British birds are travelling so far east, as many other populations of species breeding in Britain tend to head straight south to West Africa.