WEIGHT INCREASE AND FEATHER DEVELOPMENT IN THE GOLDCREST REGULUS REGULUSHAFTORN S.1978; ORNIS SCAND.; NOR; DA. 1978; VOL. 9; NO 2; PP. 117-123; BIBL. 18 REF.Article

One Norwegian territory of the Marsh Tit Parus palustris during 35 yearsHAFTORN, S.Ibis (London. 1859). 1997, Vol 139, Num 2, pp 379-381, issn 0019-1019Article

INCUBATION DURING THE EGG-LAYING PERIOD IN RELATION TO CLUTCH-SIZE AND OTHER ASPECTS OF REPRODUCTION IN THE GREAT TIT PARUS MAJORHAFTORN S.1981; ORNIS SCAND.; ISSN 0030-5693; NOR; DA. 1981; VOL. 12; NO 3; PP. 169-185; BIBL. 48 REF.Article

COOPERATION BETWEEN THE MALE AND FEMALE GOLDEREST REGULUS REGULUS WHEN REARING OVERLAPPING DOUBLE BROODSHAFTORN S.1978; ORNIS SCAND.; NOR; DA. 1978; VOL. 9; NO 2; PP. 124-129; BIBL. 9 REF.Article

ENERGETICS OF INCUBATION BY THE GOLDCREST REGULUS REGULUS IN RELATION TO AMBIENT AIR TEMPERATURES AND THE GEOGRAPHICAL DISTRIBUTION OF THE SPECIES.HAFTORN S.1978; ORNIS SCAND.; NORVEGE; DA. 1978; VOL. 9; NO 1; PP. 22-30; BIBL. 21 REF.Article

VARIATION IN BODY WEIGHT, WING LENGTH AND TAIL LENGTH IN THE GREAT TIT PARUS MAJOR.HAFTORN S.1976; NORWEG. J. ZOOL.; NORWAY; DA. 1976; VOL. 24; NO 4; PP. 241-271; BIBL. 31 REF.Article

Contexts and possible functions of alarm calling in the willow tit, parus montanus; the principle of 'better safe than sorry'HAFTORN, S.Behaviour. 2000, Vol 137, pp 437-449, issn 0005-7959, 4Article

Is the coal tit parus ater really the most subordinate of the Scandinavian its?HAFTORN, S.Ornis Scandinavica. 1993, Vol 24, Num 4, pp 335-338, issn 0030-5693Article

Ontogeny of the vocal repertoire in the Willow Tit Parus montanusHAFTORN, S.Ornis Scandinavica. 1993, Vol 24, Num 4, pp 267-289, issn 0030-5693Article

The diurnal body weight cycle in titmice Parus sppHAFTORN, S.Ornis Scandinavica. 1992, Vol 23, Num 4, pp 435-443, issn 0030-5693Article

Seasonal and diurnal body weight variations in titmice, based on analyses of individual birdsHAFTORN, S.The Wilson bulletin (Wilson Ornithological Society). 1989, Vol 101, Num 2, pp 217-235, issn 0043-5643Article

The effect of temperature and clutch size on the energetic cost of incubation in a free-living Blue Tit (Parus caeruleus)HAFTORN, S; REINERTSEN, R. E.The Auk. 1985, Vol 102, Num 3, pp 470-478, issn 0004-8038Article

Geographic variation of the storing behaviour in the Coal tit Parus ater : role of winter residency and environmental conditionsBROTONS, L; HAFTORN, S.Ibis (London. 1859). 1999, Vol 141, Num 4, pp 587-595, issn 0019-1019Article

Different metabolic strategies of northern birds for nocturnal survivalREINERTSEN, R. E; HAFTORN, S.Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology. 1986, Vol 156, Num 5, pp 655-663, issn 0174-1578Article

Thermoregulatory abilities in chicks of the Antarctic Petrel (Thalassoica antarctica)BECH, C; MEHLUM, F; HAFTORN, S et al.Polar biology (Print). 1991, Vol 11, Num 4, pp 233-238, issn 0722-4060Article

Thermoregulatory and behavioral responses during incubation of free-living female Pied Flycatchers Ficedula hypoleucaHAFTORN, S; EIDSMO REINERTSEN, R. E.Ornis Scandinavica. 1990, Vol 21, Num 4, pp 255-264, issn 0030-5693Article

Navigation to nest site in the snow petrel (Pagodroma nivea)HAFTORN, S; MEHLUN, F; BECH, C et al.The condor (Los Angeles, CA). 1988, Vol 90, Num 2, pp 484-486, issn 0010-5422Article

Independent discoveries of a new, apparently homologous call in the Willow Tit Parus montanus and Black-capped Chickadee Parus atricapillusHAFTORN, S; HUANG, W.-C; GRISWOLD, C. K et al.Ibis (London. 1859). 1998, Vol 140, Num 1, pp 174-176, issn 0019-1019Article