Figure 23.46: Diversity among the Amphibians (A) Burrowing caecilians superficially look more like worms than amphibians. (B) A golden toad pair in Costa Rica. This species has recently become extinct, one of many amphibian species to do so in the past few decades. (C) A European fire salamander. (D) This Austin blind salamander’s life cycle remains aquatic; it has no adult terrestrial stage. The eyes of this cave dweller have become greatly reduced.