Dideria plants are odd looking and covered in spines, making this forest difficult to travel through. Sifakas, however, don't seem to have trouble. It is said to make gigantic leaps, and David Attenborough tries to see how it does it. Sifaka food is almost exclusively vegetable. They are very picky eaters which makes them difficult to keep in captivity.
This clip was first broadcast in 1961.