Decline of the Orkney Hen Harrier Circus cyaneus population: do changes to demographic parameters and mating system fit a declining food hypothesis?: Capsule A decline in polygyny and lower secondary female breeding success have reduced male productivity and most likely led to the population decline.

Author： Amar Arjun   Picozzi Nicholas   Meek Eric R.   Redpath Stephen M.   Lambin Xavier  

Publisher： Taylor & Francis Ltd

ISSN： 0006-3657

Source： Bird Study, Vol.52, Iss.1, 2005-03, pp. : 18-24

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