Peer-Reviewed Journal Details
Mandatory Fields
Fernandez-Bellon, D;Wilson, MW;Irwin, S;Kelly, TC;O'Mahony, B;O'Halloran, J
2018
September
Journal Of Raptor Research
Video evidence of siblicide and cannibalism, movement of nestlings by adults, interactions with predators in nesting hen harriers
Validated
WOS: 2 ()
Optional Fields
CIRCUS-CYANEUS BREEDING SUCCESS INFANTICIDE HABITAT CAMERAS ORKNEY BIRDS
52
393
399
During a nest-camera study of Hen Harriers (Circus cyaneus), we recorded siblicide, cannibalism, movement of nestlings by adult birds, and interactions with predators. We deployed cameras at 13 nests across three study areas in Ireland between 2008 and 2010. At a nest with two well-developed nestlings (approximately 25-30 d old), the older nestling killed its sibling and fed on it. This was the first documented case of siblicide in this species, to our knowledge. Recordings also revealed three other events of cannibalism in which one of the nestlings in a brood died from unknown causes and was then eaten by its siblings (n = 1), by the adult male (n = 1), or was used by the adult female to feed the remaining nestlings (n = 1). At two nests, recordings showed the adult female picking up and moving nestlings that were outside the nest cup. In addition, cameras recorded two instances of full brood predation by red fox (Vulpes ruipes) and an attack on a nest by a female Eurasian Kestrel (halm tinnunculus) that had no apparent consequences for the nestlings or the female Hen Harrier. The behaviors reported here, which are difficult to observe directly, may have important consequences for our understanding of productivity and population dynamics of Hen Harriers.
HASTINGS
0892-1016
Grant Details