Some snakes are well equipped to defend themselves through venom or by sheer size, but most snakes are small and non-venomous. Hissing is an intimidating sound, and it helps to dissuade would-be predators. read more
Snakes hiss probably due to other reasons like breathing in air, smelling, frightened, and hungry. It is also thought that snakes hiss as a way of telling hello to other animals. The reason for the snakes to hiss is to keep the predators away and as a defense mechanism against the other animals. read more