Book excerpt: A comprehensive survey of the valuable work undertaken by Britain's network of bird observatories, with summaries and tables of noteworthy events and much historical background. Bird observatories are research stations established mainly for the study of migration, particularly by means of ringing. There are now 18 scattered around the Britain and Ireland at key points on migration routes, on coastal promontories or small islands. Part of their attraction is the regular occurrence of rarities that are found each year at these observatories. Written by wardens and ringers from each location, Bird Observatories of Britain and Ireland is a timely new edition of one of the earliest Poyser titles. It includes detailed coverage of the history, location, habitats and ornithological interest of each observatory, including summaries and tables of noteworthy events.