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Born gray, ____ become pink after eating lots of shrimp.
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aphids
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Mammoths, elephants, and ____ have large teeth called tusks.
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flamingos
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Female kangaroos and ____ carry their young in a pouch.
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koalas
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Killer whales, also called ____, are black with white undersides.
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orcas
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Tree ____ are slow-moving mammals of tropical rainforests.
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ostriches
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Penguins, emus, rheas, kiwis, and ____ are flightless birds.
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seahorses
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Female ____ transfer eggs into the brood pouches of males.
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sloths
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Some ants farm ____ for their honeydew (sugary excretion).
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walruses
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