How smart are lizards ?
It depends on the species. Anoles and most geckos are not very smart at all. Others, such as some iguanas, are quite intelligent, and some monitors are very smart–almost as smart as, say, a parakeet. Igs seem to be _reasonably_ intelligent. de Vosjoli, in the Green Iguana Manual, relates the story of a herpetologist for a major zoo who once saw an iguana hit a tree with its tail, and two pieces of fruit fell off. Then another iguana ran up and ate both pieces. The first iguana bit the second on the foot, and the second ig ran away. This, he said, was the most intelligent thing he’d ever seen an iguana do.
