Study suggests widespread illegal killing of hen harriers on English grouse moors

phys.org | 3/20/2019 | Staff
jenny1246 (Posted by) Level 3
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A new study reveals that young hen harriers in England suffer abnormally high mortality compared to populations in Orkney and mainland Scotland and provides compelling evidence that the most likely cause is illegal killing in areas associated with grouse moor management.

Published today in Nature Communications, this paper represents the culmination of a 10-year Natural England study involving 58 satellite tagged hen harriers. The analyses have been led by the University of Aberdeen and the University of Cape Town with the provision of land use data by the RSPB.

Study - Likelihood - Hen - Harriers - Disappearing

The study showed the likelihood of hen harriers dying, or disappearing, was ten times higher within areas predominantly covered by grouse moor, compared to areas with no grouse moor. The study revealed that 72 percent of tagged harriers were either confirmed or considered very likely to have been illegally killed.

The hen harrier, sometimes called the 'skydancer' because of its amazing acrobatic display in the breeding season, is one of England's rarest birds and is legally protected. Illegal killing of hen harriers has long been thought to limit their population size, but identifying the scale of these crimes and their impact on harrier populations has been difficult because they occur in remote areas and evidence is likely to be destroyed, thus successful prosecutions are rare. This long-term study has enabled patterns of disappearances to be assessed across a large number of birds. This provides overwhelming evidence that illegal killing...
(Excerpt) Read more at: phys.org
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