Poison frog colors are honest signals of toxicity, particularly for bird predators

Maan ME & Cummings ME
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Maan, M. E., & Cummings, M. E. (2012). Poison frog colors are honest signals of toxicity, particularly for bird predators. American Naturalist, 179(1), E1-E14. https://doi.org/10.1086/663197