seman...
Some species of snake poison their prey. Other snakes constrict their prey until suffocated. Either way, the prey has to be swallowed whole.
some types of snakes can eat the poison dart frogs, if they can cope with the poison.
Some snakes kill by constricting the prey until dead - boas, pythons, gopher snakes, etc. Some, such as garter snakes simply overpower the prey with their jaws and swallow the prey. See the image above.
Some use venom to kill their prey so that they can then eat it, and some use it to protect themselves from predators
Birds of Prey, other snakes.
Some birds of prey, such as hawks or owls, will eat snakes.
Snakes use the vitamins and minerals that they get from vegetarian prey. A mouse is omnivorous as are rats, these are the most eaten prey animals for snakes along with birds, other snakes, lizards, frogs, fish and some will eat worms or insects. Some snakes have evolved to be a species-specific prey-eaters, like the snakes that eat eggs.
snakes
Some snakes have poison/venom
Snakes do not chew their prey, they swallow them whole. Snakes have curved teeth along the whole length of the mouth to hold prey and keep it from escaping. Some snakes have hollow or grooved teeth for injecting venom.
Not all snakes are poisonous. Some are constrictors which means that they bite their prey and wrap themselves around their food to suffocate the prey. Examples of constrictors are Ball Pythons and Anacondas. Poisonous snakes do have poison in their fangs though.
Some snakes use camouflage to hide themselves from prey using the plants around them. Some of snake's prey eat plants, so if plants disapeared, then so would snake's prey.