Mystery photographs

01 September 1982 Comments Main paper With really good views there is no problem in separating Bridled Sterna anaethetus and Sooty Terns S. fuscata. Only one other species comes into the reckoning: in view of the recent addition of Aleutian Tern S. aleutica to the western Palearctic list, ...
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Polygamy by Willow Warblers

01 September 1982 Comments Main paper The Willow Warbler Phylloscopus trochilus is generally considered to be single brooded, though a small proportion of pairs may raise a second brood (Campbell & Ferguson-Lees 1972; Witherby et al. 1938-41). Few if any of these records of 'second bro...
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