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Penguins, emus, rheas, kiwis, and ____ are flightless birds.
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flamingos
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Arctic ____ have the longest migration journeys.
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ostriches
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White mulberry leaves are a favorite food for ____.
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puffins
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Female ____ transfer eggs into the brood pouches of males.
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ravens
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Born gray, ____ become pink after eating lots of shrimp.
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seahorses
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Crows caw, whereas ____ are larger and make croaking sounds.
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silkworms
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Most common ____ breed on or near Iceland.
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terns
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Mammoths, elephants, and ____ have large teeth called tusks.
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walruses
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