The diademed sifaka, is an endangered species of sifaka, one of the lemurs endemic to certain rainforests in eastern Madagascar.
This species is one of the world's largest living lemurs, with a total adult length of approximately 105 centimetres (41 inches),half of which is tail.
P. diadema is readily distinguished from all the other lemur species by its characteristic markings and large physical size.
Its entire coat is moderately long, silky and luxuriant.
The long white fur encircling its muzzle and covering its cheeks, forehead and chin, engenders the "diadem" or crown appearance.
Its eyes are a reddish brown, the muzzle is short, and the face is bare with colourisation of darkish gray to jet black.
The crown fur is also quite black and often extends to the nape of the neck.
Reference: Wikipedia