"Walking lizards" or "tattooed lizards" are a species of lizards which can be found in the unexplored southern jungles of Sothoryos, known as the Green Hell.
These lizards are tattooed, and run down their prey on their powerful hind legs. They have long curved claws, which they use to rip their prey apart.
A Game of Thrones
Syrio Forel describes seeing rare live specimens kept in the exotic animal menagerie of the Sealord of Braavos.
||Hear me. The ships of Braavos sail as far as the winds blow, to lands strange and wonderful, and when they return, their captains fetch queer animals to the Sealord's menagerie. Such animals as you have never seen, striped horses, great spotted things with necks as long as stilts, hairy mouse-pigs as big as cows, stinging manticores, tigers that carry their cubs in a pouch, terrible walking lizards with scythes for claws. Syrio Forel has seen these things.
- Syrio Forel
to Arya Stark