Which lizard is known for its spiny 'beard' under its neck?

The bearded dragon is the lizard known for the spiny “beard” beneath its neck.

Bearded dragons belong to the Australian lizard genus Pogona. Their throat area contains a pouch covered with pointed scales. When a dragon feels threatened, competes with another lizard, or courts a mate, it can expand this pouch and darken it—sometimes to nearly black. The display makes the animal appear larger and more intimidating, while also communicating its mood and social status.

The name “bearded dragon” refers to this beard-like throat display, not to hair or a separate organ. The central bearded dragon, Pogona vitticeps, is the species most commonly kept as a pet, but the genus includes several related species. Bearded dragons are native to Australia, where they live in environments ranging from dry woodland to desert and shrubland.

Their beard is only one part of a broader visual language. Head-bobbing often signals dominance, while arm-waving can indicate submission. They also flatten their bodies, open their mouths, and raise their spiny scales when alarmed. Unlike a chameleon, a bearded dragon’s defining neck display is a defensive and social signal rather than a camouflage trick.