Where does this come from, and can I check it?

Swifts feed, mate, and sleep in mid-air without landing on ground. The figure is taken from National Geographic, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

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Yes. It sits on the Animals shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

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The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

Common swifts can stay airborne for ten months continuously

Swifts feed, mate, and sleep in mid-air without landing on ground.

Except during their brief nesting season, common swifts remain aloft continuously as they glide over Europe and Africa. Non-invasive geolocator tracking revealed that young swifts spend up to ten months in constant flight, taking short power naps on soaring warm air currents.

Where this comes from

National Geographic

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Tags: swift, birds, flight

Common swifts can stay airborne for ten months continuously: the short answers

Where does this come from, and can I check it?: Swifts feed, mate, and sleep in mid-air without landing on ground. The figure is taken from National Geographic, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a animals fact?: Yes. It sits on the Animals shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.