Best Of Natural History Radio

This week's Saving Species explores the mysteries of bird migration. Joanna Pinnock joins the British Trust for Ornithology on an early morning expedition to put a special transmitter on a Cuckoo. Chris Sperring is in Somerset finding out about the fortune of the pied flycatcher, and Mark Brazil reports from the northern Japanese island of Hokkaido on the little understood Latham's Snipe. Presenter: Brett Westwood, Producer: Sheena Duncan, Editor: Julian Hector.