Author Details

Hogstad, Olav, Norway

• Ornis Norvegica Vol 36 (2013) Articles
  Species richness and structure of a breeding passerine bird community in a spruce-dominated boreal forest in central Norway: stability from 1960s to 2013
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• Ornis Norvegica Vol 31 (2008) Articles
  Reproductive correlates of eggshell thickness in European woodpeckers
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• Ornis Norvegica Vol 38 (2015) Articles
  Social behaviour in the non-breeding season in Great Tits Parus major and Willow Tits Poecile montanus: differences in juvenile birds’ route to territorial ownership, and pair-bond stability and mate protection in adults
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• Ornis Norvegica Vol 33 (2010) Articles
  Sexual differences in foraging behaviour in the Lesser Spotted Woodpecker Dendrocopos minor
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• Ornis Norvegica Vol 33 (2010) Articles
  Does high social rank position affect winter survival of Willow Tits Poecile montanus negatively under prolonged conditions of extremely low ambient temperature?
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• Ornis Norvegica Vol 40 (2017) Articles
  Are wintering Common Redpolls Carduelis flammea more exposed to avian predators than other small passerines?
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• Ornis Norvegica Vol 32 (2009) Articles
  Gloger’s ecogeographical rule and colour variation among Willow Tits Parus montanus
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• Ornis Norvegica Vol 29 (2006) Articles
  Reproductive differences between woodpeckers and secondary hole-nesters
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• Ornis Norvegica Vol 27 (2004) Articles
  Feeding frequencies and nest defence of Fieldfares in relation to body size, physical condition and sex of parents
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• Ornis Norvegica Vol 32 (2009) Articles
  Winter flock coherence in Willow Tits – who decide what and why
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• Ornis Norvegica Vol 31 (2008) Articles
  Sexual bill dimorphism supports separation of the woodpecker genera Dendrocopos Koch (1816) in the Palaearctic and Picoides Lacépède (1799) in the Nearctic
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• Ornis Norvegica Vol 32 (2009) Articles
  Sexual differences of labour during breeding activities and territory use in the Lesser Spotted Woodpecker Dendrocopos minor
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