The Peruvian Poison Frog (Hyloxalus argyrogaster) is a species of poison dart frog in the Hyloxalus genus. Despite having cryptic coloration, it is quite toxic; its poison is only slightly weaker than that of H. subpunctatus, making it the 4th most toxic of the eight poiaonous species in the genus Hyloxalus. The Peruvian Poison Frog's natural habitat consists of subtropical or tropical moist forests, subtropical or tropical moist mountains, and rivers.