Here are this weeks five facts for you... Did you know... The feathers of a pigeon weigh more than its bones. Did you know... A woodpecker pecks twenty times a second! Did you know... A swift fly's at 120mph. Did you know... Birds have hollow bones, which help them fly. Did you know... A flock of goldfinches is called a charm. There we have this weeks five facts. We hope you have enjoyed them. Follow us on Twitter @BritishBirdFood or 'like' us on Facebook.