Uromastyx is a genus of African and Asian agamid lizard whose members are better-known as spiny-tailed lizards, uromastyces, mastigures, or dabb lizards. Uromastyx are primarily herbivorous, but occasionally eat insects, especially when young.
Blue-tongued lizards, or skinks, have vivid cobalt-colored tongues. Native only to Australia, they're docile creatures that are often kept as pets. They're also the world's largest urban-dwelling wild lizards, and can grow as long as two feet!