Poison dart frog (also dart-poison frog, poison frog or formerly poison arrow frog; Dendrobates azureus) is the common name of a group of frogs in the family Dendrobatidae which are native to Central and South America. Unlike most frogs, these species are active during the day and often exhibit brightly-colored bodies. Although all wild dendrobatids are at least somewhat toxic, levels of toxicity vary considerably from one species to the next and from one population to another. Many species are critically endangered. These amphibians are often called "dart frogs" due to indigenous Amerindians' use of their toxic secretions to poison the tips of blowdarts. In fact, of over 175 species, only three have been documented as being used for this purpose (curare plants are more commonly used), and none come from the Dendrobates genus, which is most characterized by the brilliant color and complex patterns of its members.
Taken at Denver Zoo.
Poison Skin - The most amazing adaptation these frogs have is their ability to produce toxins. The toxins in the skin of these frogs are found in high concentrations in the prey they eat, especially ants. After eating the ants, these toxic compounds are secreted by glands in the frog’s skin providing them with a powerful means of defense. The toxin is capable of paralyzing or even killing potential predators.
Deadly Colors - Although many frogs are green or have muted colors and patterns that help them hide from potential predators, some frogs like the blue poison arrow frog use bright colors as a means of defense. The brilliant blue color of these frogs serves as a warning to potential predators not to eat it. Often the more vibrant and colorful a frog is, the more poisonous it may be.
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{K:78768} 5/1/2010
