"Encyclopedia Brown" Vocabulary

amphibians cold-blooded animals with backbones and moist skins stumped confused because something is hard to understand or solve reference a source used for information lizards reptiles with long bodies and tails and movable eyelids salamanders animals shaped like lizards but related to frogs and toads David raced over to the new exhibit at the zoo. Nothing was there! He was baffled and stumped. Had there been a crime in which the animals were stolen? Had they escaped? He checked the sign as a reference about the animals that should be in the new exhibit. Suddenly he noticed where all of the rattlesnakes and other reptiles were hiding! The large sign had hidden them from view.