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Canada geese in migration.
How do birds fly? How fast do they fly? And where do birds sleep? These are all good questions, and they deserve good answers. Thankfully, the birding experts at Bird Watcher’s Digest have some good answers! Here are some of the interesting questions that people often ask about birds.
Learn the answers to these questions:
What makes a bird a bird?
How do birds fly?
How fast do birds fly?
Do birds fly at night?
Why do birds migrate?
How do birds know where to go when they migrate?
Where do birds sleep, and how do they survive severe weather conditions?
What makes a bird a bird?
The first thing most people notice about birds is that they can fly, but that is not what makes them unique. Bats, bugs, and butterflies also take to the air, and they aren’t birds. What makes birds different from every other kind of animal on earth are feathers. Feathers make it possible for birds to live a large part of their lives in the air. Feathers weigh very little, are strong (to survive long flights), and provide terrific insulation (which is why people living in the coldest parts of the world prefer jackets stuffed with goose down). Most birds also have hollow bones. If bird bones were solid, like human bones, birds would be too heavy, which would make flight very difficult.
How do birds fly?
The simple answer is: with their wings. A more accurate answer is that everything about a bird’s body is designed for flight, including its specialized feathers, hollow bones, and very strong flight muscles located in the breast. As a bird flaps its wings, the force of the wings does two things: lifts and propels the bird. As the wings push downward and backward, more air is moved below the wing than above it. This difference in the amount of air, or air pressure, is what causes lift, and results in upward and forward movement of the bird.
The concept of lift, such as that produced by a bird’s wing, can be illustrated easily. Hold your hand, flattened with fingers together, just outside the window of a moving car. When the leading edge of the hand tilted upward, the force of the wind immediately pushes the hand upward. This is exactly how the aerodynamic design of a bird’s wing helps to create life and helps to hold a bird in the air in between flaps or while gliding.
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