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Born gray, ____ become pink after eating lots of shrimp.
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beetles
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Fireflies are really flying ____ that flash light to attract mates.
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flamingos
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Mammoths, elephants, and ____ have large teeth called tusks.
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krill
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Blue whales eat small shrimp-like creatures called ____.
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octopuses
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To escape from predators, ____ can release black ink.
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ostriches
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Penguins, emus, rheas, kiwis, and ____ are flightless birds.
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ravens
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Crows caw, whereas ____ are larger and make croaking sounds.
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silkworms
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White mulberry leaves are a favorite food for ____.
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walruses
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