Carrion/Hooded Crows Corvus c. corone/cornix were unmolested on my study area from January 1966 to April 1969 as part of a long-term study of Crow predation on eggs of Red Grouse Lagopus I. scoticus. This gave me an unusual opportunity to study Crow numbers, breeding performance, dispersal and roosting behaviour on and adjacent to a grouse moor, and, from 1969 when control measures were resumed


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