Sibon – Snail-eating snakes

The genus Sibon is a group of fascinating, mostly small, slender snakes found throughout Central and northern South America, especially in rainforests, cloud forests, and tropical lowlands. These snakes are often called “snail-eating snakes” because of their specialized diet — they have evolved to feed primarily on snails, slugs, and other soft-bodied invertebrates. Unlike many other snakes, Sibon species are harmless to humans, as they are non-venomous and rely more on stealth and precision than on speed or aggression.

Sibon snakes are typically thin-bodied, with large, round eyes and vertical pupils, giving them an almost gentle, inquisitive appearance. Their coloration varies between species but often includes browns, grays, olives, and even soft greens, sometimes with beautiful banding, speckles, or blotches that help them blend into leafy or mossy backgrounds. They are nocturnal, meaning they are most active at night when the forest is cooler and damp, making it easier to hunt their slimy prey.

One of the coolest things about Sibon snakes is their unique jaw structure. Because snails have hard shells, Sibon snakes have developed specialized teeth and flexible jaws that allow them to extract the soft bodies of snails without breaking the shell. It’s a delicate and impressive technique that shows just how specialized evolution can be.

Sibon snakes often hunt among wet leaves, mossy logs, and bromeliads — places where slugs and snails are plentiful. Their slow, careful movements are perfect for stalking these slippery creatures. Another cool detail: many Sibon species have mildly sticky tongues, which help them grab onto slippery prey before pulling it into their mouths.