What's the only bird that can hover?
Thursday, March 28, 2024
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| Original photo by FluidMediaFactory/ iStock |
| Hummingbirds are the only birds that can hover. | Hummingbirds sometimes seem otherworldly compared to other feathered friends. They see more colors than the human eye does, and can even enter a deathlike state to survive frigid winter nights. But their most remarkable ability has to do with their incredibly fast-moving wings, with the fastest flapping upwards of 80 times per second. Thanks to those incredible appendages, hummingbirds can hover — and they're the only species of bird that can do so on their own for a sustained period of time. Hummingbirds can also move up, down, left, right, forward, and yes, even backward (another unique ability), reaching speeds of 75 miles per hour. According to Audubon, the hummingbird also has really sensitive "brakes," and can switch from flying 25 miles per hour to coming to a dead stop within the length of a human index finger.
How are hummingbirds such aerial aces? Well, most birds achieve lift only when flapping their wings down, but hummingbirds swish their wings in a side-to-side, figure-eight pattern, which is more characteristic of an insect than a bird (the feat has earned them the excellent nickname "hummingbugs"). Although hummingbirds have evolved to use their wing muscles efficiently, their tiny bodies have an incredibly high metabolism, which means the creatures must constantly hunt for food to survive. Remarkably, hummingbirds can drain up to 10 drops of nectar from a flower in 15 milliseconds (or 1/100th of a second).
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 | | A species of hummingbird is the smallest bird in the world. | | |
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| A species of hummingbird is the smallest bird in the world. |  |  |
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| The patches of glittering feathers on the necks of hummingbirds are called __. |  |
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 | Numbers Don't Lie |
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 | | Average number of heartbeats per minute of a typical hummingbird in flight | | 1,200 |
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| | | Year British inventor Christopher Cockerell invented the world's first hovercraft | | 1955 |
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| | Estimated number of hummingbird species found around the globe | | 350 |
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| | | Price Marty McFly's hoverboard from "Back to the Future II" fetched at a 2021 auction | | $501,200 |
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 | Hummingbirds are found only in the Americas, but they originated in Europe. |
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| Hummingbirds are so unlike other birds that scientists still don't quite understand their origins. One lingering mystery: why hundreds of species of hummingbirds can be found in the Americas when absolutely zero are seen zipping around Europe. The situation is particularly strange because hummingbirds appear to have originated in Europe, breaking away from swifts — their closest avian cousin — around 45 million to 55 million years ago, with the earliest hummingbird-like fossils found in Germany. One theory suggests that the birds migrated across a former land bridge between Siberia and Alaska, although it's not clear why. It's also possible that the Old World fossils and the New World species represent a case of convergent evolution: when two unrelated species develop the same attributes in response to similar pressures in their environment. For now, the true story of hummingbird evolution remains a mystery. | | |
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posted by June Lesley at 5:21 AM
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