This latest addition to the Poyser series provides the first comprehensive overview of two closely related birds: Marsh Tits and Willow Tits. These species lead fascinating lives, and are often studied as models for social behaviour, spatial memory and the effects of habitat change and fragmentation. British populations are currently undergoing dramatic declines, and general interest in the conservation and ecology of these birds is at an all-time high. This book brings together not only the wealth of information that has been accumulated by researchers across Europe over several decades, but also unique personal insights from the author's own studies. Individual chapters cover: taxonomy and distribution; morphology; habitat, foraging and food hoarding; territory, movements and social behavior; nest-sites and breeding behavior; and conservation. Importantly, advances in identification will also be included, reflecting the ongoing challenges of separating these two very similar species.