A similar occurrence happened to frogs in 1974 in Australia. Two thousand Rheobatrachus silus went to winter in the rocks like they did every year, but none came out for the summer. Rheobatrachus silus is now said to be extinct. Other disappearances have been recorded. One year when she arrived in the valley where she usually did her research, most of the frogs were dead, and the ones that were alive were bloated and red.
T here are many theories for the mysterious disap-pearance of the frogs around the world.
Habitat destruction is one of these theories. Instead of protecting the environment, this policy kills it. Without periodic fires, the forests are over ridden with growth, and the frogs' marshland homes turn into woods. A third theory blames all of the non-native fish being added to the high elevation lakes. These fish often carry diseases that native frogs are not immune to.