 Sanford brown lemurs are distinguishable by color as they are more gray and brown with no v-shaped crown on their forehead.The male Sanford lemur also have characteristic white ruffs around their ears and cheeks that are absent from the crowned lemurs.The crowned lemurs of Ankarana Reserve are the only lemurs in this region known to traverse the razor-sharp "tsingy" (the eroded limestone rock that is characteristic of this national park) as they head into the forest early in the morning and as they leave the forest just before sunset to settle in the safer canyon forest in the center of these rock fields for the night.