Silky sifakas have long eked out an existence in rugged, high-altitude forests. Now the growing number of people nearby pose a threat to the furtive primate. Kevin Schafer Clustered in the ...

Sifakas use those powerful legs to leap quickly and go from tree to tree, often clearing distances of 30-40 feet. Once they find a nice clump of trees, they use their powerful legs to stay in place.