Bird Flightless Evolution

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many flightless bird species

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flightless birds

Live Science

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Science

Why don't all birds fly?

Summary

Nutrition label

82% Informative

Around 60 species — fewer than 1% of all bird species — are flightless, including ostriches, penguins and kiwis.

The ability to fly is especially useful for escaping predators and traveling long distances.

Island-dwelling birds, facing few to no predators and less competition, tend to evolve toward flightlessness.

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Informative language

Neutral language

Article tone

semi-formal

Language

English

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Offensive language

not offensive

Hate speech

not hateful