How do high-altitude birds take to the air when thin air offers little lift?
In high altitudes, despite the air being of low density, which makes the bird wings produce less lift and more difficult to remain aloft, high-altitude birds such as bar-headed geese, cranes, and bar-tailed godwits have been seen at high altitudes of over 6,000 metres. One possibility of how birds at high altitudes take to the air…
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