These little frogs are easily recognized by their blue color, which is generally darker on the limbs and belly and overlaid with black spots or patches, especially on the head and back.
As their name implies, poison dart frogs can release toxins from the skin that are distasteful and potentially lethal to would-be predators.
Blue poison dart frogs are active during the day and can be found hiding among boulders and debris near streams and among leaf litter on the forest floor; however, they lack toe webbing and are poor swimmers, so they are not found in the water.
The blue poison dart frog lays small clutches of five to six eggs. After hatching, the parents transfer tadpoles to individual pools of water, where they finish development.