Possible Clues:

• Herbivore I found out of place in S America? Yes and no
• Troublesome Guiana reptile
• Pet that's a herbivore
• Looking back, article in summer is initially for exotic Green type living in forest
• Lizard with spinytail varieties
• Lizard King mural -- neat, but odd bits missing
• Lizard that can grow to be six feet long
• Tennessee Williams's 'The Night of the ___'
• Car leaving Nicaragua crushed lizard
• Mexican lizard, possible pet