Elapid
Some species spend most of their lives in trees or bushes; this is called arboreal (African Pseudohaje and Dendroaspis, Australian Hoplocephalus). Many others are  specialised burrowers (e.g. Ogmodon, Parapistocalamus, Simoselaps, Toxicocalamus, Vermicella). Some species have very generalised diets. Others  have specialised on a certain kind of prey. They have also adapted themselves, to better be able to feed on other snakes, certain lizards, squamate eggs, mammals, birds, frogs, fish, etc.