Habitat destruction remains the primary threat to the species, largely as a result of the explosive growth in the human population on Madagascar (5). In some areas, hunting has also been reported (2). These threats, coupled with the lemur's very limited range, give cause for considerable concern (2). Thus, the white-collared brown lemur is listed as one of the world's 25 most endangered primates (6).
Currently, this lemur is found in three protected areas, Manombo Special Reserve, Midongy du Sud National Park and the Andringitra National Park, although there is further concern here, as the Andringitra population hybridizes with Eulemur rufus (6) (7). Recent surveys have also identified populations in unprotected forests, such as Vevembe, that could be added to existing parks and reserves (6). However, the white-collared brown lemur currently remains Critically Endangered, and its fate will most probably be determined by the future of its diminishing forest habitat, which needs to be better preserved if extinction of this animal is to be prevented.