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Flight identification of European raptors

13 March 2014 Comments Main paper We now turn to the four harriers Circus, a genus associated with extensive reedbeds, cornfields and moorland, not requiring trees or cliffs as do most raptors. Three--Marsh C. aeruginosas, Hen C. cyanms and Montagu's C. pjgargus--are comparatively common,... Read More

Winter roosting behaviour of Hen Harriers in northern England

01 January 2010 Comments Main paper This article presents some observations on the winter roosting behaviour of Hen Har- riers Circus cyaneus in northern England during the winters of 2006/07 and 2007/08. The 7-km2 study area of low-lying hills (100-235 m asl) is a mixture of bog, heath, co... Read More

Mystery photographs

01 April 1993 Comments Main paper When I first saw this photograph (plate 31, repeated here), it was at a distance, so all I could see was what looked like a silhouette of a raptor, which could be an Accipiter. It has pretty good wing shape for a large female Eurasian Sparrowhawk A. ni... Read More

Juvenile Hen Harriers showing 'Marsh Hawk' characters

01 August 1988 Comments Main paper Adult Hen Harriers Circus cyaneus show marked sexual dimorphism, but juveniles of both sexes of the European and Asiatic subspecies C. c. cyaneus are generally considered to be very similar to, or practically indistinguishable from, the adult female (W... Read More