The author of my fiercely scientific guidebook about amphibians and reptiles in Costa Rica doesn’t believe in common names. “Poison Frogs of the Genus Phyllobates” is about as close to a vernacular description as I can find in the text for this shiny little gem. This particular specimen (Phyllobates vittatus) was found in a tiny mud cave in the Corcovado National Park by expert guide, Nito. The species is endemic to the area near the Osa Peninsula and the Golfo Dulce, and so I’ve assigned it the not-very-scientific appellation “Golfo Dulce Poison Frog.”

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