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Golden Frog (Bufo periglenes). Field Museum of Natural History, Chicago. FMNH nos. 167967-69. Conservation status: extinct. This species was known only from the Reserva Biologica Monteverde, Costa Rica, a pristine reserve at  1500-1600m elevation that is far from human contact. A common and well-known species until 1987, the population crashed in 1988. That year only eight males and two females were located. A significant number of frog and toad species disappeared at the same time. Chytridiomycosis (a fungal disease) and climate change are believed to be the causes of decline. A single Golden Frog male was found in 1989 and he was the last record of the species.  ..As biologists describe new species and add to our understanding of the interrelated nature of life on Earth, a species becomes extinct every 20 minutes (100 to 1000 times the background extinction rate as seen in the fossil record). Collections in natural history museums play important roles in conservation, education and research. Most of that work and the associated specimens are not on public display in museums? typically, less than five percent of specimens are exhibited.