Letters

The recent paper by Richard Broughton (Brit. Birds 102: 604-616) summarised a welcome analysis of the relative importance of the various criteria used to separate Willow Poecile montana and Marsh Tits P. palustris. We consider, however, that the con- clusion drawn by some of that paper's readers may be too pessimistic. Positive field identification of those two species may be challenging, but it is...