Red Ruffed Lemur Barking To Call Others From A Tree In The Open Enclosure Of Zoo

red ruffed lemur ruffed lemur critically endangered madagascar fauna wildlife mammal primate endangered jungle nat geo varecia rubra rainforest zoo national geographic hide vegetation enclosure animal woodland captivity habitat branch species wilderness singapore bark nature forest wild creature plant wood environment foliage masoala leaf barking tree critically closeup rare call behavior open natural fur red park