What are the four types of poisonous snakes found in the US?

The four types of poisonous snakes commonly found in the United States are indeed the rattlesnake, copperhead, water moccasin, and coral snake. Each of these species possesses venom that can be harmful to humans.

Rattlesnakes are easily identifiable by their distinctive rattle at the end of their tails and are found throughout the country. Copperheads have a coppery-brown coloration with hourglass-shaped patterns on their bodies, and they are typically found in wooded or overgrown areas. Water moccasins, also known as cottonmouths, are semi-aquatic snakes that are often found in swamps or slow-moving waters; they are known for their aggressive behavior when threatened. Lastly, coral snakes, while less frequently encountered, are identifiable by their bright red, yellow, and black banding patterns and have a potent venom.

The other options contain snakes that are either non-venomous or not native to the United States, such as gopher snakes and king snakes, which are constrictors; garter snakes, which are generally harmless; and pythons, which are not native to the US and are not considered venomous. This distinction is crucial for understanding snake identification and safety in interactions with these reptiles.