There are 19 lemur species belonging to the family Indriidae, including nine species of woolly lemurs, nine species of sifakas and the indri. These medium to large sized primates are found exclusively on the island of Madagascar. All indrids are strict herbivores eating mostly leaves, fruits and flowers. Despite being arboreal, indrids do descend to the ground occasionally. When on the ground, they stand upright and move in a series of short hops. In the trees, however, they can make extraordinary leaps and are extremely agile.