Crows caw, whereas ____ are larger and make croaking sounds.
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caribou
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Cicadas are true bugs, whereas ____ are grasshoppers.
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flamingos
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Blue whales eat small shrimp-like creatures called ____.
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krill
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Aphids (tiny plant-eating pests) are a favorite food for ____.
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ladybugs
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Arctic ____ have the longest migration journeys.
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locusts
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Tree ____ are slow-moving mammals of tropical rainforests.
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ravens
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Lichen is a major food source for ____.
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sloths
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Born gray, ____ become pink after eating lots of shrimp.
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terns
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