Hunting habitat selection by hen harriers on moorland

Implications for conservation management

Beatriz Arroyo, Arjun Amar, Fiona Leckie, Graeme M. Buchanan, Jeremy D. Wilson, Stephen Redpath

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

We examine habitat use by hunting hen harriers Circus cyaneus at three study sites in Scotland to evaluate whether foraging patterns differ between sexes, sites, and stages of the breeding period. We modelled time spent hunting in focal plots as a function of habitat and nest proximity. Male hunting intensity (time spent hunting per hour of observation and km(2)) varied between sites and breeding periods, being lower during the nestling than the incubation period. Habitat use patterns were mostly consistent among study sites, which is important for developing species management recommendations applicable over the species' range. Males avoided improved grassland, and selected areas of mixed heather and rough grass (with an optimum at ca. 50% heather cover). The effect of nest proximity was small. In contrast, females hunted mainly within 300-500 In of the nest, with a small additive effect of vegetation cover, areas of fragmented heather being preferred. Habitat management to benefit foraging harriers will involve creating (or maintaining) mosaics of heather/grassland around nest areas. Additionally, it might be possible to manipulate habitat to reduce conflict in areas where harrier predation on red grouse is important by segregating areas holding highest grouse densities (with high heather cover) from those favoured for harrier foraging (heather-grass mosaics). However, it would be necessary to test whether these manipulations might also influence harrier nest distribution, an effect which could negate any benefits from this strategy. (C) 2008 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)586-596
Number of pages11
JournalBiological Conservation
Volume142
Issue number3
Early online date3 Jan 2009
DOIs
Publication statusPublished - Mar 2009

Keywords

  • habitat management
  • protected areas
  • foraging ecology
  • modelling
  • European agricultural policies
  • vole microtus-agrestis
  • kestrel Falco-Naumanni
  • circus-cyaneus
  • red grouse
  • land-use
  • nesting habitat
  • modeling approach
  • foraging activity
  • Southern England

Cite this

Hunting habitat selection by hen harriers on moorland : Implications for conservation management. / Arroyo, Beatriz; Amar, Arjun; Leckie, Fiona; Buchanan, Graeme M.; Wilson, Jeremy D.; Redpath, Stephen.

In: Biological Conservation, Vol. 142, No. 3, 03.2009, p. 586-596.

Research output: Contribution to journalArticle

Arroyo, Beatriz ; Amar, Arjun ; Leckie, Fiona ; Buchanan, Graeme M. ; Wilson, Jeremy D. ; Redpath, Stephen. / Hunting habitat selection by hen harriers on moorland : Implications for conservation management. In: Biological Conservation. 2009 ; Vol. 142, No. 3. pp. 586-596.
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