Population changes of riparian birds along rivers and canals in the Severn-Trent region between 1989 and 1993.
Author(s): Marchant, J.H. & Gregory, R.D.
Published: January 1994 Issue No.: 148 Pages: 32pp
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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.