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

Radio tracking shows common swifts flying without landing for most of the non-breeding season. The figure is taken from Britannica, 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 2,600 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.

Mondo Knows Facts

Some swifts stay airborne for months

Radio tracking shows common swifts flying without landing for most of the non-breeding season The birds feed and even sleep in flight, riding air currents above the weather. They return to the nest only to breed. Researchers tracked individuals for more than ten months without a single landing. It sits in Mondo's animals collection, one of 200 facts that each trace back to the reference below.

Where this comes from

Britannica

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

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Nature & Animals trivia

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Arctic terns complete the longest migration of any animalArctic terns fly about 90,000 kilometres annually from pole to pole.A godwit flew 11,000 kilometres without landingThe bar-tailed bird crossed the Pacific in about nine days Alpine swifts can stay airborne for over 200 daysTracking showed the birds never landed during their African winter Arctic terns make the longest migration of any animalTagged birds flew nearly 90,000 kilometres in one annual round trip Monarch butterfly migration spans four distinct generationsThe butterflies returning south in autumn have never been there before.No monarch butterfly completes the whole migrationThe return journey north takes three or four generations

Tags: birds, migration, swifts

Some swifts stay airborne for months: the short answers

Where does this come from, and can I check it?: Radio tracking shows common swifts flying without landing for most of the non-breeding season. The figure is taken from Britannica, 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 2,600 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.