FaunaHub

Glass Lizard (e.g. Pseudopus apodus)

ReptileLegless lizardLook-alike

Glass lizard (Pseudopus apodus), a large legless lizard that looks like a snake.

European glass lizard / sheltopusik (Pseudopus apodus).

Image: Yuliya Krasylenko, CC BY-SA 4.0, via Wikimedia Commons.

Overview

Glass lizards are legless lizards that look astonishingly like snakes — long, slender, and limbless — yet they are true lizards, not serpents. The European glass lizard or sheltopusik (Pseudopus apodus), shown here, is one of the largest, a hefty, yellowish-brown reptile that can exceed a metre in length. Their name comes from their fragile tail: like many lizards, glass lizards can shed (and seemingly “shatter”) part of the tail to escape, leaving the still-wriggling piece to distract a predator.

Several features give the game away that these are lizards, not snakes: they have movable eyelids (snakes do not), external ear openings, and usually a stiff body with a groove along each side — and the tail makes up much of their length.

Note: “glass lizard” covers several species; details here use the sheltopusik (Pseudopus apodus) as a reference. Treat general statements as approximate and verify against authoritative sources.

Habitat & Range

Glass lizards live in warm, dry, and grassy or scrubby habitats. The sheltopusik ranges across parts of southeastern Europe, the Balkans, and into western and central Asia, in open grassland, scrub, rocky slopes, and field edges; other glass lizards live in North America and Asia. They like sunny ground with cover, hiding in vegetation, burrows, and crevices.

Diet

Glass lizards are carnivores. The large sheltopusik eats insects and other invertebrates such as snails and slugs (using strong jaws to crush snail shells), as well as small vertebrates including rodents, other lizards, and eggs. Smaller glass lizards feed mainly on insects, spiders, and similar small prey. They forage on and just under the ground, using their flexible bodies to push through grass and litter.

Behavior

Despite lacking legs, glass lizards move with a stiffer, less fluid motion than snakes, aided by a flexible groove running along each side of the body that lets them expand when breathing or feeding. Their signature defence is tail autotomy: when grabbed, the tail can break — sometimes into pieces — and keep twitching to distract the attacker while the lizard escapes; a new tail regrows, though usually shorter and less perfect. They are mostly day-active, bask to warm up, shelter in burrows and crevices, and hibernate through cold winters. They are harmless to people, though a large sheltopusik can give a firm bite if mishandled.

Human Interaction & Conservation

Glass lizards are often mistaken for snakes and needlessly killed out of fear, even though they are harmless and helpful controllers of insects, snails, and rodents. They face pressures from habitat loss and persecution, but several species remain reasonably widespread. Learning to recognise the lizard traits — eyelids, ear openings, and a long fragile tail — helps people appreciate rather than fear them. Consult authoritative sources and the IUCN Red List for species-specific status.

More photos of the glass lizard

A glass lizard showing its long, snake-like, legless body.

Glass lizard (Pseudopus apodus).

Image: (c) Kseniia Marianna Prondzynska, some rights reserved (CC BY), CC BY 4.0, via Wikimedia Commons.

Frequently Asked Questions — Glass Lizard

Is a glass lizard a snake?
No — it's a true lizard that just happens to be legless and snake-like. The giveaways are features snakes lack: glass lizards have movable eyelids (so they can blink), external ear openings, and a long, fragile tail that often makes up more than half their length. Snakes have none of these traits, so a closer look easily tells them apart.
Why is it called a 'glass' lizard?
Because of its fragile, easily shed tail. Like many lizards, glass lizards can break off their tail to escape a predator — and the tail may seem to 'shatter' into pieces, which keep wriggling to distract the attacker. This brittle, breakaway tail gives the animal its glassy name. The tail regrows over time, though usually shorter.
How can you tell a glass lizard from a snake?
Look for eyelids, ear openings, and tail proportions. Glass lizards can blink (snakes can't), have visible ear holes (snakes don't), and have a very long tail that can break off — much of their length is tail behind the vent. Many also have a flexible groove along each side of the body. Snakes lack all of these features.
Are glass lizards dangerous?
Not at all. Glass lizards are harmless, non-venomous reptiles that pose no threat to people; a large one might give a firm bite only if mishandled. They're actually useful, eating insects, snails, and small rodents. Sadly they're often killed out of a mistaken fear that they're snakes.

Sources and further reading

Authoritative wildlife references used for general educational context. Conservation status should always be verified against current IUCN Red List data. External links open in a new tab.