Gopher snakes are a common species in the US where coloring is often black and brown. The main colors of the species are influenced by vegetation and regional influences.
Small Dekay’s Brownsankes (Storeria dekayi) are often confused with Earthsnakes based on their size. These snakes grow to 13 inches and they can be a lot smaller as adults.
Common Watersnakes (Nerodia sipedon) are frequently seen in North America. The habitat of the species is what makes many believe these are Cottonmouths.
Garter snakes (Genus Thamnophis) can come in dark body colors with brown stripes and black spots of an alternating pattern. Garter snakes are opportunistic and growing in numbers in North America.
The Western Rattlesnake (Crotalus oreganos) is often seen in a dark brown color with brown and black blotches. Western Rattlesnakes can also have a dark gray or olive-like color with dark blotches.
Known for a brown to black body with black blotches and an almost white underbelly, the Western Ratsnake (Pantherophis obsoletus) is one of the longest snakes in the US.
Western Diamond-backed Rattlesnakes (Crotalus atrox) have a gray color which can sometimes be tan or olive.
Banded Watersnakes (Nerodia fasciata) are found in a diverse combination of colors. The crossbands are seen from head to tail while the rest of the dorsal background color is brown.
This venomous snake species (Crotalus horridus) has a long brown line running through the middle of the body. These snakes are common in the Eastern half of the US except in Florida.
Northern Cottonmouths (Agkistrodon piscivorus) are found in a common brown to gray-brown color with black blotches. The snake can also be completely black.