| 21. | The plumage of several species is dark with a metallic sheen.
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| 22. | The different forms vary principally in the darkness of the plumage.
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| 23. | Its plumage is largely grey above, and paler grey below.
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| 24. | This is the only jacana to have a different breeding plumage.
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| 25. | It has an even more flamboyant plumage than the wood duck.
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| 26. | The courtship ritual, like the plumage, is rather showy.
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| 27. | The similarly sized red-billed hornbill has uniformly grey plumage.
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| 28. | Juveniles are slightly duller, but otherwise all plumages are similar.
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| 29. | Its plumage is very similar to the other three steamer ducks.
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| 30. | The eclipse plumage looked similar to a dark eclipse mallard drake.
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