Tweet of the Day is a series of fascinating stories about our British birds inspired by their calls and songs.
Bill Oddie presents the ring ouzel. Ring ouzels are related to blackbirds and because they nest in the uplands, they're sometimes known as the 'mountain blackbird'. The male ring ouzel is a handsome bird, sooty black with a broad white ring called a 'gorget' right across his chest that stands out like a beacon. Unfortunately these summer visitors are becoming harder to find even in their strongholds, which include the North York Moors and several Scottish and Welsh mountains.