| 1. | In addition, Leiopelma lack external ear drums and produce only limited vocalizations.
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| 2. | Therefore, cotton swabs should be used only to clean the external ear.
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| 3. | Cotton swabs should be used only to clean the external ear ."
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| 4. | It had no external ears, but holes where the ears should be.
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| 5. | How do birds have such acute hearing when they have no external ears?
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| 6. | Dogs also have numerous apocrine glands in their external ear canals.
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| 7. | Examples of this rule in birds are rare, as they lack external ears.
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| 8. | External ear infections are most common during the summer months.
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| 9. | The Creo are gray-skinned, with heavy muscles and thick brows, and no external ears.
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| 10. | *Snakes don't have external ears, but they can sense sound.
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