Separation of Willow Tit and Marsh Tit in Britain: a review 16 November 2009 Comments Main paper These sound files accompany a paper on the separation of Willow and Marsh Tits, published in BB in November 2009: ... Read More
Lanceolated Warblers at Fair Isle and the problems of identification 01 January 1975 Comments Main paper ... Read More
The moult gatherings and moult migration of Shelduck in northwest Germany 01 January 1975 Comments Main paper ... Read More