In a unique new collaboration, Collins have paired up with the respected British Trust for Ornithology, bringing together the most authoritative and up-to-date information in this new field guide to the common birds of Britain and Ireland. This unique new identification guide features all of the birds that have occurred five or more times in Britain and Ireland, including all species that breed regularly in the region, plus those that winter here, or occur as common passage migrants. The book has been written and illustrated as much with the beginner in mind as the experienced birdwatcher. Designed to be used in the field, the text and photographs describe and illustrate the key features needed to identify a species with confidence, and to separate it from similar, or ‘confusion’, species. Relative abundance maps are shown for every species. The darker shading shows where a species is most abundant, and the lighter shades where it is less so. These are based on the very latest BTO information.