Autumn migration trajectories (IMAGE)
Caption
Terrestrial birds are capable of flying for hundreds of kilometers over the open sea. Nourani et al. show that the autumn migration trajectories of some of these birds correspond with uplift over the sea surface. Suitable uplift means less drag, making sea-crossing less energetically demanding. Moreover, strong uplift can allow the birds to soar.
Credit
Elham Nourani / Max Planck Institute of Animal Behavior
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License
Original content