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dc.contributor.authorSolheim, Roar
dc.date.accessioned2018-02-08T11:42:59Z
dc.date.available2018-02-08T11:42:59Z
dc.date.created2017-09-06T15:46:54Z
dc.date.issued2014
dc.identifier.citationOrnis Svecica. 2014, 24 (1), 3-11.nb_NO
dc.identifier.issn1102-6812
dc.identifier.urihttp://hdl.handle.net/11250/2483494
dc.description.abstractRecord breaking numbers of breeding Great Grey Owls Strix nebulosa were reported in Sweden and Norway in 2010 and 2011, followed by 4105 observations in 2012 as revealed by the national Species archives. Based on locality id numbers, at least 144 individuals were reported with photos which could be used to age the individuals. The majority (76%) of these birds were young birds hatched in 2011 (83% including birds aged probably 2CY). Among dead owls brought to the Natural History Museum in Stockholm, the percentages of owls hatched in 2011 were similar (78% and 88%). The high percentage of young owls could be caused by young birds hunting closer to human settlement than older birds, but more likely it was caused by a higher total production of young in south-central Scandinavia in 2011 than in 2010. This study shows that photos in the national species archives reveal the age structure of the Great Grey Owl population, fundamental data to understand the current distributional expansion of this species. This method may also be applied to other species.nb_NO
dc.language.isoengnb_NO
dc.publisherSveriges ornitologiska föreningnb_NO
dc.titleAge of Great Grey Owls Strix nebulosa observed in Scandinavia in 2012 as revealed by digital photos in the national species report archives.nb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.pagenumber3-11nb_NO
dc.source.volume24nb_NO
dc.source.journalOrnis Svecicanb_NO
dc.source.issue1nb_NO
dc.identifier.cristin1491488
dc.description.localcodenivå1nb_NO
cristin.unitcode201,0,0,0
cristin.unitnameUniversitetet i Agder
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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