The gray-headed lemur is only found in southeastern Madagascar, from the Manampatrana River south to the Mananara River.

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.

Consequently the common name gray-headed lemur and the scientific name Eulemur cinereiceps were resurrected to replace white-collared brown lemur and E. albocollaris respectively.

The gray-headed lemur (Eulemur cinereiceps), or gray-headed brown lemur, is a medium-sized primate, a cathemeral species of lemur in the Lemuridae family.

Consequently the common name gray-headed lemur and the scientific name Eulemur cinereiceps were resurrected to replace white-collared brown lemur and E. albocollaris respectively.