The Von der decken's sifaka (Propithecus deckenii), is a species of sifaka endemic to Western Madagascar. It has a length of 92 to 107 centimeters, of which 42-48 centimeters are tail. It lives in dry deciduous forest. Its pelage is usually creamy white, with tinges of yellow-gold, silver grey or pale brown on the neck, shoulders, back and limbs. The face is entirely black. Group size is between 2 and 10 individuals, with groups of 3 to 6 most common.