| There are an astounding number of ways in
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| | bats, birds and flying reptiles are alike
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| which animals move on the land, in the
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| | in having bones. An insect's wing, like
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| air and in water.Land-dwelling mammals
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| | an insect's body, has no bones at all.
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| can to walk, run and jump. Salamanders,
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| | The veins that strengthen its wing are
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| turtles and lizards also walk, but are
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| | really air tubes with strong walls.A
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| often said to crawl. Termites and ants
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| | great many animals also live in the
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| are among the many insects that walk a
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| | water, primarily because there is much
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| great deal too. Grasshoppers and
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| | more room for them than on land.
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| crickets jump, but they also walk about
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| | Mammals, such as dolphins and whales,
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| slowly when they are eating. Even flying
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| | live only in the water. Many birds do a
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| birds must be able to walk or hop on
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| | great deal of paddling about in the
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| land. The garden snail produces a watery
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| | water. Reptiles, like turtles and
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| liquid that serves as a private lake.
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| | amphibian animals, like frogs, can also
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| This snail rolls through this lake by
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| | live half their lives in a body of water.
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| contracting muscles that move its skin.
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| | But most of the swimming animals belong
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| This is also another form of animal
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| | to the class of fishes. The movement of
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| movement on land.Many animals live in the
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| | a fish's tail fin helps propel a fish
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| ground and must get from place to place.
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| | through the water. Yet many fish can
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| Moles and other burrowing animals dig
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| | still swim even if most of the tail fin
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| their way through the earth rapidly with
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| | is a bitten or cut off.They can push
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| shovel-like legs. Earthworms often eat
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| | themselves through the water by twisting
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| their way through. When the soil is
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| | their bodies from side to side. Some
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| loose, they push through it in the same
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| | fish can also move forward or backward by
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| way that they move on the surface of the
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| | means of their side fins. Other animals
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| ground. A worm also moves about by
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| | move through the water by jet propulsion.
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| digging into the ground and making itself
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| | Squids and cuttlefish suck water into
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| longer and then shorter. In this way it
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| | their bodies and then squirt it out.
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| pulls itself ahead.Several other animals
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| | This shoots them forward. Jellyfish also
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| fly through the air to transport
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| | swim by jet propulsion. They open their
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| themselves. Others, like flying
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| | jelly umbrellas and then rapidly close
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| squirrels, flying frogs, flying fish and
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| | them. When the stream of water gets out,
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| flying lizards do not really fly but
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| | the jellyfish is pushed forward. Many
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| instead glide through the air. The best
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| | tiny animals row themselves through
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| gliders are the flying fish that leap
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| | water. They have tiny hairs called cilia
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| from the water with such force that they
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| | which act as oars. Other tiny creatures
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| can glide as far as 50 yards.A true
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| | have whiplike threads with which they
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| flying animal has the ability to propel
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| | pull themselves forward.There are still
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| itself through the air by beating its
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| | more curious ways in which animals move.
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| wings against the air. Only four groups
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| | Some ride from place to place on other
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| of animals have produced species that can
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| | animals, like the remora fish. It
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| truly fly: they are the bats, the birds,
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| | fastens itself onto sharks or other big
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| the insects and the flying reptiles that
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| | fish so that when the sharks kill another
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| died out with the dinosaurs. Each group
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| | fish, the remora frees itself to go after
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| has its own kind of wing design and
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| | a part of the meal.
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| aerodynamics. However, the wings of
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