The biggest snake in the US, reticulated pythons can reach 32 feet, live in various habitats, kill by constriction, and have brown bodies with black-bordered diamond-shaped markings.
Green anacondas, the heaviest snake in the US, reach 30 feet, weigh up to 550 pounds, live near water, are apex predators, and have olive-green bodies with black blotches.
Central African rock pythons, reaching 20 feet, have brown bodies with black-bordered dark brown blotches, are native to sub-Saharan Africa, and eat anything they can catch.
Southern African rock pythons can grow up to 16 feet, are typically 9-13 feet long, and have brown bodies with dark brown blotches; an established population exists in Texas.
Burmese pythons, reaching 16 feet, inhabit the Florida Everglades, are invasive, prey on endangered species, and have dark brown bodies with black-bordered blotches.
Boa constrictors, or red-tailed boas, can reach 15 feet, live in southern US regions, are excellent climbers and swimmers, and have cream, gray, or brown bodies with reddish-brown saddle markings.
Asiatic rock pythons, around 10 feet long, have yellowish bodies with tan and dark brown blotches, were introduced via the pet trade, and pose a threat to native wildlife in several states.
The largest native US snake, the eastern indigo snake, reaches 9.2 feet, lives in the southeastern region, has smooth blueish-black bodies, and preys on small mammals, birds, lizards, and amphibians.