Reptiles

Legless Lizard

Multiple lizard families · also called legless lizards, snake lizards, glass snakes

Least Concern → carnivoreinsectivore Temperate grassland Temperate forest Desert

A legless lizard is exactly what it sounds like: a lizard that has given up its legs and, to a casual glance, become a snake. It is not a snake — it blinks, it has ear holes, its tail is longer than its body and snaps off when grabbed — and it is not one kind of animal either. Lizards have lost their legs, independently, more than a dozen times.

Overview

“Legless lizard” covers many unrelated lizards that converged on a snake-like body: the glass lizards and slow worms (Anguidae), the Australian flap-footed lizards, the American legless lizards, and various limb-reduced skinks. Most burrow through loose soil and sand or thread through dense grass, hunting slugs, snails, worms, and insects by feel and smell.

Lizard, not snake

The tells: a legless lizard has eyelids and blinks, has an external ear opening, has a fleshy, barely-notched tongue, cannot unhinge its jaws, and often has a tail longer than its body that it can shed and regrow — hence “glass snake”. Snakes have none of these.

Why lose the legs?

For an animal that lives by pushing through soil or matted grass, legs get in the way. A smooth legless body moves through those spaces far better. That the same solution has evolved over and over, with transitional part-limbed lizards still alive today, makes legless lizards a favourite example of convergent evolution.

Status

Least Concern for the widespread species like the slow worm, though many are killed by people, cats, and cars mistaking them for snakes. Some — several Australian flap-foots, the California legless lizards — have small ranges and are threatened by habitat loss.

Legless Lizard: common questions

How do I tell a legless lizard from a snake?

Look at the eyes and the sides of the head. A legless lizard almost always has eyelids and will blink if you watch it, and it has a small round ear opening just behind and below the eye, both of which snakes lack entirely. A legless lizard's tongue is usually fleshy and only slightly notched, not the long, deeply forked, constantly flicking tongue of a snake. Many legless lizards also have a tail far longer than the head and body, a stiffer, less fluid way of moving, and a groove running along each side of the body. If it blinks or has visible ear holes, it is a lizard.

Why would a lizard lose its legs?

Because for an animal that lives by pushing through soil, sand, or the dense tangle at the base of grass, legs get in the way. A long, smooth, legless body slides through those spaces far more efficiently, the way a snake does. Lizards have made this switch independently many times, and the transitional stages, lizards with tiny, nearly useless limbs, still exist today. It is one of the clearest living examples of the same adaptive solution evolving again and again in response to the same lifestyle.

Are legless lizards venomous or harmful?

No. No legless lizard is venomous, and they are harmless to people. The larger glass lizards can give a firm nip with their jaws if handled roughly, but they have no venom and cannot do real damage. Most legless lizards are small, secretive, and completely inoffensive, and they are beneficial in gardens and fields because they eat slugs, snails, and insect pests. The main threat runs the other way, as many are killed by people, cats, and cars because they are taken for snakes.

Is a slow worm a legless lizard?

Yes. The slow worm, common across much of Europe, is a legless lizard in the family Anguidae, the same family as the glass lizards, and not a worm or a snake. It has eyelids and can blink, it can shed its tail, and it gives birth to live young. It is one of the most familiar legless lizards and often turns up in gardens and compost heaps, where it hunts slugs. Its smooth, shiny, uniform body and slow movement are what earned it the name.

Sources & further reading

Written by HideShark Editorial Team · reviewed by HideShark Science Desk. Published September 11, 2026. Last updated September 11, 2026.

Quick facts

Scientific name: Multiple lizard families
Diet: Small invertebrates and their larvae hunted in soil, leaf litter, and the base of grass tussocks, including insects, spiders, worms, slugs, and snails, and in some larger species small lizards and the eggs and young of other reptiles
Not one group: Leglessness has evolved in lizards over and over, in at least a dozen separate lineages, and legless lizards include the glass lizards and slow worms of the Anguidae, the flap-footed lizards of Australia and New Guinea, the American legless lizards, and several limb-reduced skinks, none of them closely related to one another or to snakes
How to tell it from a snake: A legless lizard usually has movable eyelids and can blink, has an external ear opening behind the eye, has a fleshy notched tongue rather than a deeply forked one, cannot unhinge its jaws to swallow large prey, and often has a tail much longer than the body, whereas a snake has none of these
A tail that breaks away: Like many lizards but unlike snakes, most legless lizards can shed the tail when seized, and it thrashes on the ground to distract the predator while the lizard escapes, then regrows over months as a shorter, plainer stub, which is why the glass lizards are also called glass snakes
Life underground and in the grass: Most legless lizards spend their time burrowing through loose soil and sand or threading through the dense matted bases of grass and low vegetation, hunting by feel and smell, and many are rarely seen above ground except after rain or when turned up by digging
Some squeak, some mimic: Australia's flap-footed lizards keep tiny scaly flaps where the hind legs would be, some can produce a squeak or bark when grabbed, which is unusual for a lizard, and several mimic dangerous snakes in colour and in a raised, weaving threat posture
Live young or eggs: Legless lizards split between egg-layers and live-bearers depending on the group, and some, such as the slow worm, give birth to fully formed young, while the American legless lizards bear live young adapted to their cool coastal dune habitat
Range: Worldwide except the coldest regions, wherever there is loose soil, sand, leaf litter, or dense low vegetation, with glass lizards and slow worms across Eurasia, North Africa, and North America, flap-footed lizards through Australia and New Guinea, American legless lizards along the Pacific coast of the United States and Mexico, and limb-reduced skinks scattered across the grasslands and forests of every inhabited continent.
Conservation status: Least Concern → ≈ Legless lizards as a whole are not a conservation unit, and their status varies by species. Many, such as the slow worm and the common glass lizards, are widespread and of least concern, though often declining locally through habitat loss, road deaths, predation by cats, and being killed by people who mistake them for snakes. Others have small ranges and are threatened, including several Australian flap-footed lizards restricted to particular grasslands and heaths, and the California legless lizards, which depend on coastal dune and sandy soil habitats that are heavily developed and are of conservation concern in parts of their range in the wild