An evaluation of the Waterways Bird Survey as a monitor of regional and national populations of waterbirds, and an appraisal of its future role
Author(s): Marchant, J.H., Langston, R. & Gregory, R.D.
Published: January 1995 Issue No.: 155
BirdTrack migration blog (23rd-29th September)
Given the seemingly unfavourable conditions over the past week, it has been a pleasant surprise to see such a diverse range of species on the move.
One bird, twelve journeys, 60 000 miles and invaluable scientific data: PJ the Cuckoo has left an incredible legacy.