Radar Ornithology and Biological Conservation

In the approximately 60 years since the discovery that birds were responsible for some of the puzzling radar echoes dubbed “angels” by the British (Lack and Varley 1945, Buss 1946), radar has proven to be a useful tool for the detection, monitoring, and quantification of bird movements in the atmosphere (Eastwood 1967; Richardson 1979; Vaughn 1985; Bruderer 1997a, b). Radar has been a particularly…