The green-and-black poison dart frog is found in the humid lowlands from southeastern Nicaragua on the Atlantic slope and southeastern Costa Rica on the Pacific coast through Panama to northwestern Colombia (Chocó Department).[1][2][3] An introduced populations exist on Oahu;[1][2][4][5] the species was purposefully introduced there in 1932 for mosquito control. Later on, it seems to have also become established on Maui.[3]