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Of those species that have been measured during flight, the top flight speeds of hummingbirds exceed 15 m/s (54 km/h; ... At maximum descent speed, about 10 g of ...
High-speed wings Common eider: Somateria mollissima: Anatidae [19] 123 km/h 76 mph High-speed wings Eurasian teal: Anas crecca: Anatidae: 97 km/h 60 mph High–aspect ratio wings Anna's hummingbird: Calypte anna: Trochilidae: 56 km/h 35 mph [20] 70 km/h 43 mph Rapidly-beating wings
A widely quoted top speed figure of 71 mph (114 km/h) has been discredited due to lax and questionable methodology. [60] The highest speed reliably and rigorously measured in cheetahs in a straight line is 29 m/s (104 km/h), as an average of 3 runs over a 201.2-meter (220 yards) course (starting from start line already running). [61] [62]
They primarily feed on nectar and small insects. The lesser violetear has been recorded as attaining the greatest flying speed ever recorded for a hummingbird, with a pair of birds having attained 90 mph (140 km/h) during a chase, although other species may be able to attain similar speeds. [6]
Hummingbirds are small birds capable of hovering in mid-air due to the rapid flapping of their wings. They are the only birds that can fly backwards. Unless otherwise noted, all species listed below are considered to occur regularly in North America as permanent residents, summer or winter residents or visitors, or migrants.
Energy requirements for hummingbirds do not scale evenly with size increases, meaning a larger bird such as giant hummingbird requires more energy per gram to hover than a smaller bird. [21] The giant hummingbird requires an estimated 4.3 calories of food energy per hour to sustain its flight. [21]
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The rufous hummingbird (Selasphorus rufus) is a small hummingbird, about 8 cm (3 in) long with a long, straight and slender bill. These birds are known for their extraordinary flight skills, flying 3,200 kilometres (2,000 miles) during their migratory transits.