Hummingbirds split from their sister group, the swifts and treeswifts, around 42 million years ago. The common ancestor of extant hummingbirds is estimated to have lived 22 million years ago in South America. They are known as hummingbirds because of the humming sound created by their beating wings, which flap at high frequencies audible to humans.
They hover in mid-air at rapid wing-flapping rates, which vary from around 12 beats per second in the largest species to around 80 per second in small hummingbirds. Of those species that have been measured during flying in wind tunnels, their top speeds exceed 15 m/s (54 km/h; 34 mph). During courtship, some male species dive from 30 meters (100 ft) of height above a female at speeds around 23 m/s (83 km/h; 51 mph).
La boisson
Oeuvres d'Artistes, Art digital, Art digital
Auteur: Phil Caterino
50.8 x 101.6 cm /
20 x 40 in
Thèmes: Nature / Origines: Arts d'Amérique du Nord / Genres: Fauvisme / Authenticité: Original / Types d'Artistes: Artistes de loisirs / Période: Contemporain /
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