Flight speeds of swifts (Apus apus): seasonal differences smaller than expected.

  title={Flight speeds of swifts (Apus apus): seasonal differences smaller than expected.},
  author={Per Henningsson and H{\aa}kan Karlsson and Johan B{\"a}ckman and Thomas Alerstam and Anders Hedenstr{\"o}m},
  journal={Proceedings. Biological sciences},
  volume={276 1666},
We have studied the nocturnal flight behaviour of the common swift (Apus apus L.), by the use of a tracking radar. Birds were tracked from Lund University in southern Sweden during spring migration, summer roosting flights and autumn migration. Flight speeds were compared with predictions from flight mechanical and optimal migration theories. During spring, flight speeds were predicted to be higher than during both summer and autumn due to time restriction. In such cases, birds fly at a flight… CONTINUE READING

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Publications referenced by this paper.
Showing 1-10 of 33 references

Radarbeobachtungen über Zug und Nachtflüge des Mauerseglers (Apus apus)

B. Bruderer, E. Weitnauer
Rev. Suisse Zool • 1972
View 7 Excerpts
Highly Influenced

How fast can birds migrate

A. Hedenström, T. Alerstam
J. Avian Biol • 1998
View 1 Excerpt
Highly Influenced

Swifts in a tower

D. Lack
View 5 Excerpts
Highly Influenced

Adaptations to migration in birds: behavioural strategies, morphology and scaling effects.

Philosophical transactions of the Royal Society of London. Series B, Biological sciences • 2008
View 2 Excerpts

Strategies for the transition to breeding in time-selected migration

T. Alerstam
Ardea • 2006
View 2 Excerpts

Roosting in tree foliage by common swifts Apus apus

J. Holmgren
Ibis 146, • 2004
View 1 Excerpt

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