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F. Liechti ; A. Hedenstrom ; T. Alerstam 1994J Theor Biol 170 p219-225
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J. Pettersson ; A. Hedenstrom 1986Fagelvarld Suppl 11 p171-174
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A. Hedenstrom, Auteur ; M. Rosen, AuteurProjected body frontal area is used when estimating the parasite drag of bird flight. We investigated the relationship between projected frontal area and body mass among passerine birds, and compared it with an equation based on waterfowl and ra[...]
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T. Alerstam, Auteur ; A. Hedenstrom, AuteurThe full magnitude and complexity of bird migration have not been possible to grasp until after the revolutionary discoveries made with the aid of, e.g., ringing, systematic field observations and radar. These have opened up opportunities for a [...]
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M. Green, Auteur ; T. Alerstam, Auteur ; G. A. Gudmundsson, Auteur ; A. Hedenstrom, Auteur ; T. Piersma, AuteurWe analysed five data sets of night directions of migrating arctic waders ill relation to,winds, recorded by tracking radar and optical range finder, in order to find out if these birds compensate for wind drift, or allow themselves to be drifte[...]
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O. Fero, Auteur ; Z. Barta, Auteur ; A. Houston, Auteur ; J. M. McNamara, Auteur ; A. Hedenstrom, Auteur
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A. J. van Noordwijk, Auteur ; F. Pulido, Auteur ; B. Helm, Auteur ; T. Coppack, Auteur ; J. Delingat, Auteur ; H. Dingle, Auteur ; A. Hedenstrom, Auteur ; H. van der Jeugd, Auteur ; C. Marchetti, Auteur ; A. Nilsson, Auteur ; J. Perez-Tris, AuteurEvolutionary change results from selection acting on genetic variation. For migration to be successful, many different aspects of an animal's physiology and behaviour need to function in a co-coordinated way. Changes in one migratory trait are t[...]
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A. Hedenstrom, Auteur ; T. Alerstam, AuteurBird migration is typically characterized by periods of flight, when fuel is consumed, and intervening stopover periods when fuel is deposited. The resulting overall migration speed can be calculated on the basis of flight speed, rate of Furl de[...]
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M. Rosen, Auteur ; A. Hedenstrom, Auteur ; A. Badami, Auteur ; F. Spina, Auteur ; S. Akesson, AuteurThe Eleanora's Falcon Falco eleonorae breeds on islands and islets in the Mediterranean region and feeds its young on migratory birds caught in the air. The breeding season is scheduled to coincide with the peak of bird migration. Between IZ and[...]
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T. Alerstam, Auteur ; A. Hedenstrom, Auteur
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A. L. R. Thomas, Auteur ; A. Hedenstrom, AuteurConventional models of bird Eight combine metabolic, mechanical, and aerodynamic components to calculate the rate of fuel consumption and power required for flight, from which we may derive the optimal speeds Eying animals should use in differen[...]
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A. Hedenstrom, AuteurSong flight in birds serves as a signal involved in mate choice and territoriality. In the Skylark Alauda arvensis the song flight is a noticeable feature during the breeding season. Single song flights sometimes lasted for more than 30 min, but[...]
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T. P. Weber, Auteur ; T. Alerstam, Auteur ; A. Hedenstrom, AuteurDespite evidence that wind conditions are ail important factor in determining stopover decisions, models of time-minimizing bird migration have up to now emphasized the optimal response of the migrants to variations in fuel acquisition rates. We[...]
