The two Rhinoderma species are commonly referred to as 'mouth brooding' frogs because of their highly unusual form of parental care (2) (3). Following mating, the female Chile Darwin's frog lays a clutch of 12 to 24 tiny eggs on moist ground. Around eight days later, when the larvae in the eggs begin to move, the male ingests the eggs and incubates them in the vocal sac. Once the larvae have developed sufficiently, the male regurgitates the tadpoles into a stream where they complete their metamorphosis (1) (2) (3). The Chile darwin's frog is a terrestrial species that is most active during the day. It feeds on small insects and other invertebrates, and is thought to hunt by staying still and waiting for prey to move within striking distance (2) (3).