This is the only frog known to be naturally fluorescent. Its skin emits a bright green fluorescent glow in the dark. Note the horizontal slit pupils suggesting nocturnal activity, presumably enhanced by their fluorescence. Canon PowerShot SX60 HS.
References:
Taboada, Carlos; Brunetti, Andrés E.; Pedron, Federico N.; Neto, Fausto Carnevale; Estrin, Darío A.; Bari, Sara E.; Chemes, Lucía B.; Lopes, Norberto Peporine; Lagorio, María G.; Faivovich, Julián (2017). "Naturally occurring fluorescence in frogs". Proceedings of the National Academy of Sciences. 114: 201701053. doi:10.1073/pnas.1701053114. ISSN 0027-8424. PMC 5389305. PMID 28289227. Retrieved July 2, 2019.
Wikipedia contributors. (2019, May 15). Polka-dot tree frog. In Wikipedia, The Free Encyclopedia. Retrieved 15:45, July 2, 2019, from https://en.wikipedia.org/w/index.php?title=Polka-dot_tree_frog&oldid=897135837