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| © Daniele Occhiato |
Researchers now have proof of something they long suspected, but it came with an impressive surprise. While they were pretty sure that the Alpine swift spends the majority of its time in the air, they found that, in their migrations, these birds actually fly nonstop for about 200 days:
https://www.sciencenews.org/article/alpine-swifts-fly-nonstop-more-six-months
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