page_title: Collared brown lemur
section_title: Anatomy and physiology
hierarchical_section_title: Collared brown lemur / Anatomy and physiology
caption_attribution_description: English: Collared brown lemur (Eulemur collaris) profiles; female on top, male on bottom.
context_page_description: The collared brown lemur, also known as the red-collared brown lemur or red-collared lemur, is a medium-sized strepsirrhine primate and one of twelve species of brown lemur in the family Lemuridae. It is only found in south-eastern Madagascar. Like most species of lemur, it is arboreal, moving quadrupedally and occasionally leaping from tree to tree. Like other brown lemurs, this species is cathemeral, lives in social groups, primarily eats fruit, exhibits sexual dichromatism, and does not demonstrate female dominance. The species is listed as Endangered by the International Union for Conservation of Nature and is threatened primarily by habitat loss.
context_section_description: An adult collared brown lemur can reach a head-body length of 39 and 40 cm (15 and 16 in) and have a tail length of 50 and 55 cm (20 and 22 in) for an overall length of 89 and 95 cm (35 and 37 in).  It has an average body weight of 2.25 and 2.5 kg (5.0 and 5.5 lb), making it a medium-sized lemur.  The only form of sexual dimorphism exhibited by the collared brown lemur is dichromatism.  The following table illustrates the coloration differences between the sexes:
  In the wild, the collared brown lemur's range does not overlap with other brown lemurs, so it is rarely confused with other species.  However, in captivity it can be easily confused with the gray-headed lemur (Eulemur cinereiceps) due to similar coloration.  The male collared brown lemur can be distinguished by their cream-colored or rufous beards, whereas the male gray-headed lemur has a white beard.  Females of these two species are nearly indistinguishable, even though genetic analyses support full species status for both taxa. In Berenty Reserve, the species have hybridized with Red lemur.
caption: Collared brown lemurs:
  Female (top) and male (bottom)
  (Illustration from 1892)
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