Poison dart frog (also poison arrow frog, dart frog or poison frog) is the common name of the small frogs in the family Dendrobatidae which are native to Central and South America. The frogs are often called poison arrow frogs or poison dart frogs due to indigenous peoples' use of their toxic excretions to poison the tips of arrows and blowdarts. In fact, of over 175 species of poison frog, only three are toxic enough to use for this purpose, and none come from the Dendrobates genus, which is most characterized by the brilliant color and complex patterns of its member species. The most poisonous of these frogs is the two-inch-long Golden Poison Frog from the genus Phyllobates.

Most poison dart frogs have brightly colored skin which is used as a warning sign to predators. These frogs can be very small, ranging from one to six centimeters in length, depending on the age, sex, and the species of the frog. They are mostly common in tropical humid environments

Image (c) Wikipedia