Best Of Natural History Radio

14/30 Chris the cuckoo is south bound, heading for Africa - but where exactly is he? We visit the British Trust for Ornithology's HQ in East Anglia and find out latest progress of him and his compatriots. We also have a report about the UK Lady Bird Survey being conducted by the Biological Records Centre. Over recent years we have heard much about the invasive harlequin ladybird pushing out our native species - but is this really the case. And how easy is it to see all the ladybrid species found in the British Isles? We'll be encouraging you to join in and if you don't know your ladybirds, why not use ispot.