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Ever since there were people, people have watched birds fly and wondered how they did it, wondering also if they too could fly. Only in the 20th century have people been able to build machines that can fly through the air (after carefully studying birds).
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van.physics.illinois.edu/qa/listing.php?id=760
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From the very start of recorded time we have been watching birds fly. They do such wonderful things: taking off, flying with twists and turns, soaring and diving, and landing again on a small branch. Fossil records show that birds have been flying for millions of years.
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wings.avkids.com/Book/Animals/intermediate/birds-01.htm...
wings.avkids.com/Book/Animals/intermediate/birds-01.html
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We love to watch birds. They fly! From the very start of time we have been looking at them. They do such great things. ... Birds are fast. They breathe faster than any other animals. Their heart beats faster. Their body temperature is higher. Birds lay eggs. All birds have wings. But not all birds fly.
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wings.avkids.com/Book/Animals/beginner/birds-01.html
wings.avkids.com/Book/Animals/beginner/birds-01.html
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2.Next, ask how do birds fly? Use these online resources and print materials to find the answer. ... site for more advanced information about how birds fly. You will learn how birds are able to fly and check out man-made flapping wing models.
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www.fi.edu/fellows/fellow6/feb99/fly.html
www.fi.edu/fellows/fellow6/feb99/fly.html
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How do birds fly? An introduction to flight in birds. ... The fact that birds fly is one of the most amazing things about them. The sight of crows or ravens playing in the wind, of seagulls gliding effortlessly along seashore or of buzzards soaring silently about the countryside always inspires me.
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www.earthlife.net/birds/flight.html
www.earthlife.net/birds/flight.html
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The extraordinary photographs on this site are from How Birds Fly, by David Goodnow, a unique book that reveals the mysteries of flapping flight through sequences of high-speed photographs. Click on each miniature, below, to see a larger-size photo.
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www.benrey.com/birds/
www.benrey.com/birds/
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