veronica toledo: i like this frog a lot.saw it for the first time, i fell in love with it, and knowing i can save it from extinction awakened my desire to do so. >> she examines the frogs four times a year, some of which are suffering from a dangerous skin disease. veronica toledo: the chytrid fungus is the main threat to amphibians around the world. so we take certain precautions when we enter their habitat. we handle darwin's frogs only when wearing gloves, because we don't know whether and which of them are infected. and we use different gloves for each frog. >> the chytrid fungus is responsible for a worldwide decrease in amphibian populations, including the dropping numbers of darwin's frogs. but here in the reserve, the biologist has found only two affected frogs. the population seems to be stable. once found, the darwin's frog is relatively easy to examine and identify. it plays dead when it senses danger. and the black and white markings on each individual's underside are unique. veronica toledo: that lets me know if

veronica toledo: that lets me know if it's an individual i've found before.ee if it's grown, whether it's travelled or changed color, anwhether 's rrying babies. >> the protection project in huilo huilo follows a basic principle, the animals are never removed from their natural habitat. after a brief examination, each frog is returned to where it was found. nature reserves like this are a stroke of luck for these delicate amphibians. back to the breeding station in concepciÓn. a few zen frogs will soon be leaving this artificial habitat. they're going on a long journey, to europe. carlos barrientos donoso: the idea is for the frogs to reproduce outside the country to give us another option. if we have any emergencies or trouble here, one of t zoos in europe can ensure the survival of the species. >> if the darwin's frogs can weather the trip halfway around the world, they'll soon have new homes, in the zoos of vienna, chester, leipzig, dusseldorf and berlin. >> do you have a favorite animal? we certainly do, and today he comes from georgia. ♪ >> my great gran