TIL about the blackpoll warbler, a 5-inch-long bird that weighs about as much as a ballpoint pen. In their fall migration they take off from the northeastern US and don’t stop flying until they reach South America- 72 to 88 hours and 1900 miles of nonstop flight over the Atlantic Ocean is involved.

Read more: https://en.wikipedia.org/wiki/Blackpoll_warbler

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