A red morph of the Granulated
Dart Frog, Oophaga granulifera.
Photo credit: Patrick Gijsbers.
Cott, H. B. 1940. Adaptive coloration in Animals. London: Methuen & Co. Ltd. (Quote from page 253.)
Wang, I. J. 2011. Inversely related aposematic traits: reduced conspicuousness evloves with increased toxicity in a polymorphic poison-dart frog. Evolution, doi: 10.1111/j.1558-5646.2011.01257.x