Proof that swifts (tårnseiler) can stay in the air without landing for 10 months at a time has been announced and they can live for 20 years which means a single bird can fly 4 million miles in its lifetime! Astonishing! Below the link, a short video of birds divebombing my house responding to me playing swift calls to attract them to my nestbox!
https://www.newscientist.com/article/2110650-swifts-break-record-by-staying-aloft-for-10-months-at-a-time/

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