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Passeriform

Noun

(Order Passeriformes)

Any member of the largest order of birds and the dominant avian group on Earth today. The passeriform birds are true perching birds, with four toes, three directed forward and one backward. Considered the most highly evolved of all birds, passerines have undergone an explosive evolutionary radiation in relatively recent geological time and now occur in abundance on all continents except Antarctica and on most oceanic islands. (global.britannica.com)

Syn: passerine or perching bird

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