Both snakes are deadly, but which is more venomous, aggressive, or lethal to humans in a real-life encounter? Find out how they compare.

It wasn't on Cape Cod, but the copperhead snake bit two dogs in Massachusetts outside its usual habitat. Here's how to identify it.

World Atlas calls 4 Mississippi lakes the most snake-infested in the state. Know how to ID venomous snakes and tell them apart from common watersnakes.