There are more than 100 species of poison dart frogs, varying in color and pattern. The black and green species has black spots, the strawberry or blue jeans frog is all red with blue legs, the yellow-banded species appears painted with yellow and black.Color shades vary among frogs within a species. It is the skin that contains the frog's poison.he most deadly species to humans is the golden poison arrow frog (Phyllobates terribilis). Its poison, batrachotoxin, can kill many small animals or humans. These frogs are found in Colombia along the western slopes of the Andes.