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10 Cards in this Set
- Front
- Back
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The ____ is a sac in the bird's esophagus that stores and moistens the food and releases it in a steady steam.
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crop
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The ____ of the bird grinds the food to make it more easily digested.
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gizzard
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Sometimes birds will eat ___ or ___ to aid in the grinding process.
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gravel or sand
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Birds have the best _____.
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eyesight
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Birds are _______, which means they have a wide range of view.
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monocular
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Some birds have binocular view -examples are __,___,__ and ___.
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owls, hawks, falcons and eages
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Because these birds are _____, they need to have keener vision at longer ranges.
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predatory
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Most birds have very sharp ____.
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hearing
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The __ ____ produce a clicking sound to see in the dark, navigating by echoes.
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cave swiftlets
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Although birds seems to lack a good sense of smell, they have excellent "noses" for ___.
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scents
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