| Albinism does occur in some populations, but there are no published records of melanism in lions. |
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| The work of Burtt and colleagues provides a nice complement to recent work on the genetic basis of melanism in birds. |
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| That pattern of morphological convergence includes larger bills, reduced rust coloration in plumage, and increased melanism or dark coloration. |
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| However, melanism and amelanism are known to occur in many species of natricine snakes. |
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| Neither erythrism nor melanism seems to occur in eastern birds, but cases of nearly, or quite, perfect albinism have been reported. |
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| The best documented temporal shift in selection is the industrial melanism of noctuid and geometrid moths in England and Europe. |
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| Atypical colourations in red foxes usually represent stages toward full melanism, and mostly occur in cold regions. |
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| Heavily worn or aberrant plumages such as melanism and albinism are much rarer in terns than in gulls. |
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| This is clear most notably in the case of industrial melanism, a process that turned light-coloured moths sooty black so that they would match their daytime perches in the polluted cities of the industrial revolution. |
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| What advantage melanism brings in these circumstances is obscure. |
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| Partial melanism in badgers is known, and albinos are not uncommon. |
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