Just before dawn , they also communicate again on their way to their sleep site .
Fork - marked lemurs are sensitive to light intensity , and emerge at twilight , calling numerous times and answering their neighbors ' calls before going off to forage .
Just before dawn , lemurs also communicate again on lemurs ' way to their sleep site .
Fork - marked lemurs are sensitive to light intensity , and emerge at twilight , calling numerous times and answering their neighbors ' calls before going off to forage .