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

Adult ostriches run at speeds exceeding 70 kilometres per hour. The figure is taken from Smithsonian, 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 Records & Extremes 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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Mondo Knows Facts

The ostrich is the largest and fastest running bird species

Adult ostriches run at speeds exceeding 70 kilometres per hour

Native to African savannas, the flightless ostrich can weigh up to 150 kilograms and reach heights of 2.8 metres. Their long, powerful legs enable sustained running speeds of 50 kilometres per hour and sprint bursts over 70. Ostriches also lay the largest eggs of any living bird species.

Struthio camelus massaicus, ostriches running at Nairobi National Park — Jorge Láscar from Australia · CC BY 2.0 · licence · source

Where this comes from

Smithsonian

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Tags: ostrich, bird, speed

The ostrich is the largest and fastest running bird species: the short answers

Where does this come from, and can I check it?: Adult ostriches run at speeds exceeding 70 kilometres per hour. The figure is taken from Smithsonian, 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 records & extremes fact?: Yes. It sits on the Records & Extremes 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.