Bird flight and optimal migration.

  title={Bird flight and optimal migration.},
  author={Thomas Alerstam},
  journal={Trends in ecology & evolution},
  volume={6 7},
The development of the mechanical and aerodynamical theory of bird flight has greatly stimulated research at widely different levels in the field of bird movement. Recent work has shown that the drag of bird bodies is less than was previously assumed. Furthermore, the structure and circulation of wingtip vortices in the wake of flying birds have been revealed, with implications for estimating flight performance on the basis of vortex theory. Predictions about optimal speed and flight behaviour… CONTINUE READING
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