CONTEXTS AND POSSIBLE FUNCTIONS OF ALARM CALLING IN THE WILLOW TIT, PARUS MONTANUS; THE PRINCIPLE OF ‘BETTER SAFE THAN SORRY’ von Haftorn, Svein

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Calls by Willow Tits (Parus montanus) during ringing and after release von Haftorn Svein

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The Effect of Temperature and Clutch Size on the Energetic Cost of Incubation in a Free-Living Blue Tit (Parus caeruleus) von Haftorn, Svein, Reinertsen, Randi Eidsmo

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A pair of the Redpoll Carduelis flammea with two clutches in Finnmark, North Norway von Haftorn, Svein

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In Memoriam: Holger Holgersen, 1914-1996 von Haftorn, Svein

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In Memoriam: Edvard K. Barth, 1913-1996 von Haftorn, Svein

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Initial winter flock formation in the Willow Tit Parus montanus. Do immigrating juveniles assess the quality of territorial adults? von HAFTORN, SVEIN

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Egg-Laying Behavior in Tits von Haftorn, Svein

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One Norwegian territory of the Marsh Tit Parus palustris during 35 years von HAFTORN, SVEIN

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Ontogeny of the Vocal Repertoire in the Willow Tit Parus montanus von Haftorn, Svein

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Geographic variation of the storing behaviour in the Coal tit Parus ater: role of winter residency and environmental conditions von Brotons, Lluís, Haftorn, Svein

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Energetics of Incubation by the Goldcrest Regulus regulus in Relation to Ambient Air Temperatures and the Geographical Distribution of the Species von Haftorn, Svein

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Seasonal and Diurnal Body Weight Variations in Titmice, Based on Analyses of Individual Birds von Haftorn, Svein

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A quantitative analysis of the behaviour of the Chinstrap penguin Pygoscelis antarctica and Macaroni penguin Eudyptes chrysolophus on Bouvetøya during the late incubation and early... von HAFTORN, SVEIN

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A quantitative analysis of the behaviour of the Chinstrap penguin Pygoscelis antarctica and Macaroni penguin Eudyptes chrysolophus on Bouvet ya during the late incubation and early... von HAFTORN, SVEIN

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A quantitative analysis of the behaviour of the Chinstrap penguin Pygoscelis antarctica and Macaroni penguin Eudyptes chrysolophus on Bouvetoya during the late incubation and early... von Haftorn, Svein

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Different metabolic strategies of northern birds for nocturnal survival von REINERTSEN, R. E, HAFTORN, S

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Seasonal and Diurnal Body Weight Variations in Titmice, Based on Analyses of Individual Birds von Haftorn, Svein

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Census of breeding Antarctic Petrels Thalassoica antarctica and physical features of the breeding colony at Svarthamaren, Dronning Maud Land, with notes on breeding Snow Petrels Pa... von MEHLUM, FRIDTJOF, GJESSING, YNGVAR, HAFTORN, SVEIN, BECH, CLAUS

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Independent discoveries of a new, apparently homologous call in the Willow Tit Parus montanus and Black-capped Chickadee Parus atricapillus von HAFTORN, SVEIN, HUANG, WEI-CHING, GRISWOLD, CORTLAND K., HAILMAN, JACK P.

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