| 1. | A captive auk was observed making a gurgling noise when anxious.
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| 2. | One of his novels tells how the great auk became extinct.
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| 3. | These birds forage for food like other auks by swimming underwater.
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| 4. | Skuas are related to gulls, waders, auks and skimmers.
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| 5. | The great auks were flightless birds that were an easy prey.
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| 6. | These include one of three great auk specimens prepared by him.
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| 7. | The auk's calls included low croaking and a hoarse scream.
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| 8. | Skuas are related to gulls, waders, auks, and skimmers.
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| 9. | Diving petrels are auk-like small petrels of the southern oceans.
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| 10. | Examples include albatross, penguins, gannets, and auks.
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