Why were many swifts and housemartins so late to return the UK this year? The RSPB's Andre Farrar has some answers. Jane Markham talks to Chris Packham, a vice president of the RSPB, and the new face of the BBC's Springwatch about joining the show plus we look ahead to some springwatching we can all do with the RSPB's new Make your nature count project. If you've enjoyed the Big Garden Bird Watch in the past then this is definitely for you.