Figure 32.18 Diversity among the Amphibians (A) Burrowing caecilians superficially look more like worms than like amphibians. They have internal fertilization and many species are viviparous. (B) Male golden toads in the cloud forest of Monteverde, Costa Rica. This is one of many amphibian species lost to extinction in the past few decades. (C) An adult spring salamander. This species has aquatic larvae but terrestrial adults. (D) This Austin blind salamander’s life cycle is completely aquatic; it has no terrestrial stage. The eyes of this cave dweller are greatly reduced.