Michael & Patricia Fogden / Darwin's Frog (Rhinoderma darwinii) male with froglets, in vocal sac, austral rainforest, Chiloe Island, Chile

Joel Sartore / Photo Ark / Darwin's frog (Rhinoderma darwinii) breathing close up, Zoologico Nacional de Chile. Endangered. Captive.

Joel Sartore / Photo Ark / Darwin's frog (Rhinoderma darwinii) breathing and opening mouth, Zoologico Nacional de Chile. Endangered. Captive.

Joel Sartore / Photo Ark / Chile mountain false toad (Telmatobufo venustus) breathing, Zoologico Nacional de Chile. Endangered. Captive.