Aspects of this topic are discussed in the following places at Britannica.
...include the black lemur (E. macaco), in which the male is black and the female is reddish brown. The rare black-and-white or black-and-red ruffed lemurs (genus Varecia) live in rainforests on the eastern side of Madagascar. The gentle lemurs, or lesser bamboo lemurs (genus Hapalemur), and the highly endangered greater bamboo lemurs...
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