New tech­nique cap­tures birds’ flight pat­terns

Science Illustrated - - MEGAPIXEL/ BIRD - Photo // Xavi Bou

If birds left vis­i­ble ev­i­dence in the sky, it would look like Span­ish pho­tog­ra­pher Xavi Bous’ pho­tos. He records birds with a high-speed video cam­era, com­bin­ing sin­gle images, which are united into one pic­ture of a bird’s flight pat­terns. This is a yel­low-legged gull cap­tured in flight. Each wing stroke con­sists of two stages: the down­ward mo­tion en­sures propul­sion, whereas the up­ward wing stroke mo­tion and the bird’s speed con­trib­ute to the lift.

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