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The hen harrier is 41–52 cm (16–20 in) [10] long with a 97–122 cm (38–48 in) wingspan. [ 11 ] [ 12 ] It resembles other harriers in having distinct male and female plumages. The sexes also differ in weight, with males weighing 290 to 400 g (10 to 14 oz), with an average of 350 g (12 oz), and females weighing 390 to 750 g (14 to 26 oz ...
Ring-tail is an informal term used by birders for the juveniles and females of several harrier species when seen in the field and not identifiable to an exact species. [9] Ring-tail harriers include the juveniles and females of Montagu's harrier (Circus pygargus), hen harrier (Circus cyaneus), and pallid harrier (Circus macrourus).
Henharrier Marsh harrier (Circus aeruginosus) female. Two years later he teamed up with the artist Donald Watson to develop the UK Hen Harrier Winter Roost Survey. [1] The thesis for Clarke's PhD in biological sciences, awarded by the University of Liverpool in 1999, was on bird of prey feeding ecology.
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The hen harrier is a bird of open habitats such as heather moorland, a type of vegetation which is typical of the reserve. Although such habitats are common in the uplands of England, the bird is scarce, being illegally persecuted as a predator of red grouse. In 2013, hen harriers failed to breed successfully in England for the first time in ...
The endangered bird is seeing a rebound under Natural England’s brood management trial which this year reared and released 13 chicks.