This is the Costa Rican variable harlequin toad (Atelopus varius), also known as the clown frog (in spite of the fact that it is a true toad). They once ranged from Costa Rica to Panama, but are now listed as critically endangered and reduced to a single population in Costa Rica. The variable harlequin toads conspicuous colouring serves as a warning to predators of the toads toxicity.
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