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| Echolocation |
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| Echolocation is a method of sensory perception by which certain animals orient themselves to their surroundings, detect obstacles, communicate with others and find food. |
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| Bats use echolocation to navigate in the dark and find food. |
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| A bat emits a series of short high-pitched ultrasonic waves from its mouth or nose. |
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| These sound waves travel away from the animal. |
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| Then they bounce off the objects in the animal's path creating an echo. |
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| A bat can determine the size and shape of the obstacle in their path, the direction of motion of the prey and also the direction of motion. |
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| This echolocation system is so accurate that bats can detect insects, the size of gnats and objects as fine as a human hair. |
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| Like bats, dolphins also emit high-frequency sound waves and are able to detect obstacles in their path. |
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| Thus dolphins can avoid fishing nets and also detect fish at night or even in muddy water through which it is not possible to see. |
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