| 11. | These birds are fairly small and slim, with short bills, round heads and long wings.
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| 12. | They have a short bill and fairly long legs.
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| 13. | Their short bills are an adaptation to aerial feeding
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| 14. | They are brownish birds with short bills and erectile crests, found on fairly-dry open grasslands.
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| 15. | It has a large head and a short bill.
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| 16. | Nightjars are medium-sized ground-nesting nocturnal birds with long wings, short legs and very short bills.
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| 17. | Their short bills are an adaptation to aerial feeding.
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| 18. | Overall, the Columbidae tend to have short bills and legs, and small heads on large, compact bodies.
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| 19. | These adaptations include a slender streamlined body, long pointed wings, and short bills with a wide gape.
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| 20. | These include a slender streamlined body, long pointed wings, and a short bill with a wide gape.
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