Certain frogs can inflate themselves to appear larger to predators.
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A hippopotamus can hold its breath underwater for several minutes.
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Certain species of ants farm aphids for food.
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Some birds can imitate sounds from their environment.
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A walrus uses its tusks to haul itself onto ice.
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A parrot can mimic human speech sounds.
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A hummingbird's heart can beat over 1,000 times per minute.
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Some fish use tools to crack open shellfish.
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Some crabs can live both on land and in water.
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