Exotic & Invasive Snake Identification

Identification

The most notorious invasive snake in Florida. Burmese pythons are massive constrictors with a tan or yellowish-brown base color and large dark brown blotches outlined in cream or gold. The head is large and arrow-shaped with a distinctive dark stripe running from the eye to the jaw. They are most established in the Everglades but have been found as far north as Jacksonville — typically escaped or released pets.

Identification

Boa constrictors are heavy-bodied snakes with a tan, cream, or gray base color and distinctive reddish-brown saddle-shaped markings that become more vivid toward the tail. The head is large and triangular with a pale stripe running from the snout through the eye. Commonly kept as pets and frequently encountered as escapes or releases throughout Northeast Florida.

Identification

Ball pythons are the most commonly kept pet snake in the United States and the most frequently encountered exotic snake in Jacksonville yards and neighborhoods. They have a dark brown or black base color with tan or gold blotches and a distinctive pale stripe along the side of the head. When threatened they curl into a tight ball — hence the name. They are not dangerous to adults but should not be handled without gloves.

Identification

While not a snake, green iguanas are frequently reported as large exotic reptiles in Jacksonville. Adults are bright green to gray-green with banded tails, a large dewlap under the chin, and a row of spines along the back. Juveniles are bright green. They are commonly found in trees, along waterways, and in suburban yards. They are not dangerous but can scratch and bite defensively.

Identification

Another large lizard — not a snake — that is increasingly encountered in Northeast Florida as its range expands northward from established South Florida populations. Black and white tegus have a distinctive black and white banded pattern, a heavy muscular body, and a forked tongue. They are highly intelligent, fast-moving, and can be aggressive when cornered. They are a serious threat to native wildlife including ground-nesting birds and gopher tortoises.

Identification

Beyond the major invasive species, Northeast Florida residents regularly encounter a wide range of released or escaped exotic reptiles — red-eared slider turtles, various monitor lizard species, chameleons, and other non-native snakes and lizards. Any reptile that appears unusual, very large, or unlike any native Florida species should be treated as potentially exotic.