Poison Dart Frog

by - 9:15 PM

I like animals (except snakes! oh God! ). I read about poison frogs and thought I'd share some infos here. These informations are gathered from thefreedictionary.com

According to amphibian expert William Duellman, there are about 220 species of poison frogs. These frogs belong to the family Dendrobatidae, a group of small, diurnal, often brightly colored frogs native to Central and South America. These frogs secrete poisonous alkaloids through their skin, which ranges in color from bright orange to black and blue. Most poison frogs are not toxic to humans or animals, but a few secrete a potent neurotoxin that can kill within minutes. Most species are not toxic to animals and humans. More than 100 toxins have been identified in the skin secretions of poison dart frogs, especially Dendrobates and Phyllobates. Members of the genus Dendrobates (of which there are at least 44 known species) are also known as "poison dart" or "poison arrow" frogs. However, only frogs of the genus Phyllobates produce the extremely potent neurotoxin, batrachotoxin, and its derivatives. Even a very small amount of the batrachotoxin found in the skins of the Golden Poison Dart Frog and at least two other species of Phyllobates frogs - on the order of just 40 micrograms - can be fatal. For the Golden Poison Dart Frog, merely touching the frog's back with the tip of the tongue could be enough to transfer a lethal dose of poison (which is most readily absorbed via mucous membranes).

Enlarge picture
Red and Blue "Blue Jeans" poison dart frog, Dendrobates pumilio.

Poison dart frogs are popularly characterized by their brightly colored skin and small size. The skin color can range from bright orange and black to blue or yellow. However, members of the most species-rich genus, Colostethus, are generally brown. Poison dart frogs range in size from 1 centimetre (0.2 in) to 6 centimetres (2.5 in) in length, depending on the age and species of the frog.

1 comments

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