Head to head
Sand Skink vs Glass Lizard
A sand skink and a glass lizard have both drifted away from typical limbed lizard life, but they solved the same basic problem of getting around without functional legs in noticeably different ways.
| Sand Skink | Glass Lizard | |
|---|---|---|
| Family | Scincidae | Anguidae |
| Limb condition | Tiny, nearly nonfunctional legs | Legs completely absent |
| Locomotion | Undulating through loose sand | Snake-like surface crawling |
| Tail defense | Not a primary defense | Tail breaks off to distract predators |
| Native range | Central Florida only | Much of the eastern and central United States |
| Habitat | Ancient sand ridge scrub | Grassland, open woodland |
| Diet | Small burrowing insects | Insects, other invertebrates |
| Conservation status | Vulnerable | Least Concern |
Sand Skink vs Glass Lizard: common questions
Why is a glass lizard called glass if it is a lizard, not made of glass?
The name refers to the glass lizard's long, fragile tail, which can break off in multiple pieces almost as easily as glass shattering when the animal is grabbed by a predator, a dramatic defensive adaptation that lizards, unlike true snakes, are able to use since the tail can typically regrow, at least partially, over time.
Does a sand skink have legs at all?
Yes, technically, though a sand skink's front legs are reduced to tiny, single-toed nubs and its back legs are only slightly larger, together contributing almost nothing to its actual locomotion, since the animal moves primarily by undulating its smooth, cylindrical body to swim through loose sand rather than by walking on these vestigial limbs.
Which is easier to mistake for a snake, the sand skink or the glass lizard?
The glass lizard is generally easier to mistake for a snake at a glance, since it moves across open ground with a visible snake-like crawling motion and has completely lost its legs, while a sand skink spends nearly all of its time hidden beneath the surface of loose sand and is rarely seen moving in the open at all.