
Naming
Ornithoscatoides nigraOrnithoscatoides ceylonica
The animal belongs to the genus Phrynarachne. The scientific name of the species was first validly published in 1884 by Octavius Pickard-Cambridge.

Defense
they mimic bird droppings in colour, shape, size and smell, deceiving predators. When they draw their legs close to their body and stop moving, the masquerade is complete.“Birds, almost all with good eyesight, will not go for what appears to be their own turd for food,” says Joseph K.H. Koh of the Lee Kong Chian Natural History Museum in Singapore.
References:
Some text fragments are auto parsed from Wikipedia.
https://www.newscientist.com/article/dn28124-zoologger-a-spider-that-looks-and-smells-like-bird-droppings/