World’s smallest birds is just one of several distinctions that hummingbird species claim. They’re the only birds that can hover in still air for 30 seconds or more. They’re the only birds with a “reverse gear”—that is, they can truly fly backward. And they’re the record holders for the fastest metabolic rate of any vertebrate on the planet: A 2013 University of Toronto study concluded that if hummingbirds were the size of an average human, they’d need to drink more than one 12-ounce can of soda for every minute they’re hovering, because they burn sugar so fast. Small wonder that these birds will wage aerial dogfights to control a prime patch of nectar-laden flowers. […]
[Photo Caption] Hummingbirds often brave downpours to gather the nectar needed to avoid starvation. This Anna’s hummingbird shakes off rain as a wet dog does, with an oscillation of its head and body. According to researchers at UC Berkeley, each twist lasts four-hundredths of a second and subjects the bird’s head to 34 times the force of gravity. Even more remarkable: Hummingbirds can do this in flight as well as when perched.
~ Brendan Borrell, from Unlocking the Secrets behind the Hummingbird’s Frenzy (National Geographic Magazine, July, 2017)
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