Northern Cat-eyed Snake
Leptodeira septentrionalis
A nocturnal, mildly venomous colubrid named for its vertical, cat-like pupils.
- Venomous?
- Mildly venomous
- Adult length
- 0.4-0.9 m (16-35 in)
- Range
- Southern Texas through Mexico and Central America
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Overview
The northern cat-eyed snake is a slender, nocturnal species distributed from southern Texas through Mexico and much of Central America. Its common name refers to its vertically elliptical pupils, an adaptation for night vision.
It is a frequent inhabitant of areas near water and is often found around temporary ponds where amphibians breed, a key part of its diet.
How to identify it
- Slender body with tan, gray, or olive ground color
- Series of dark brown or black blotches down the back
- Vertical, cat-like pupils
- Slightly enlarged head relative to neck
- Smooth scales
Habitat & range
Found in a variety of habitats including tropical forest edges, thorn scrub, and areas near ponds and streams. Ranges from southern Texas through Mexico into Central America, from lowlands to moderate elevations.
Behavior, diet & reproduction
Nocturnal, becoming active after dusk to hunt. Feeds primarily on frogs and their eggs. Rear-fanged with mild venom used to subdue amphibian prey. Lays eggs. Not aggressive toward humans.
Frequently asked questions
Is the northern cat-eyed snake dangerous?
No, its mild venom is adapted for small prey and it poses no real threat to people.
Why is it called cat-eyed?
It has vertically elliptical pupils similar to a cat's, aiding night vision.
What does it eat?
Primarily frogs and their eggs, especially near breeding ponds.
Where does it live?
From southern Texas through Mexico and Central America, often near water.
Northern Cat-eyed Snake guides
In-depth guides for identifying and understanding Northern Cat-eyed Snake.
