Hen Harrier

The hen harrier is 41–52 centimetres long with a wingspan of 97–122 centimetres, relatively long-winged and long-tailed. The sexes look different and differ in weight: males weigh 290–400 grams and females 390–750 grams. Males are smaller and mostly grey and white with black wingtips; females are larger, predominantly brown with buff underparts barred brown. Both sexes have a white rump patch, more noticeable on females and juveniles. (Wikipedia, general species account)

This bird of prey breeds in open areas such as marshes and grasslands in Eurasia and is migratory, moving further south outside the breeding season. Birds in milder regions, such as France and Great Britain, may be resident year-round, but higher altitudes are largely deserted in winter. (Wikipedia, general species account)