Photo no. 203 (plate 77) shows three falcons gathered at the entrance to what is obviously a nest-site. Most birders will immediately recognise these birds as kestrels and, with just two species breeding within the Western Palearctic, the choice lies between Common Kestrel Falco tinnunculus and Lesser Kestrel F. naumanni. The slightly `fluffy' appearance and, especially, the heavy and diffuse strea


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