The Lower Derwent Valley is one of Yorkshire's ornithological treasures and only since the mid-20th century, when a few birdwatchers were visiting the area, notably Henry Bunce and Alan Walker, was its outstanding importance for birds realised since when, during the 1980s and subsequently, many others, particularly members of the York Ornithological Club, have watched the area on a regular basis and confirmed its value. This book provides the first comprehensive review of the birds of the Lower Derwent Valley and thus establishes the definitive account of this avifauna.