Epipedobates boulengeri (marbled poison frog) is native to the humid Pacific lowlands of southwestern Colombia and northwestern Ecuador, including Colombia’s Gorgona Island. It is a small terrestrial frog with a dark ground color broken by pale yellow or cream longitudinal stripes and mottling. The species uses wet forest floor, stream margins, plantations, and disturbed vegetation where leaf litter and small pools remain available.

Males call from concealed positions and guard eggs deposited on land. After hatching, an adult transports the tadpoles on its back to water, where they continue development. The diet consists of small arthropods gathered from leaf litter. Like other poison frogs, defensive skin chemicals are connected to compounds acquired through a natural diet; captive-bred animals without that diet may lack the same toxicity. Habitat loss, contamination, and collection can affect local populations even where the frog remains common. Photographed in Colombia.