Agriculture
Seeds of the Future
Vitamin D-licious Mushrooms
Fast-flying fungal spores
Amphibians
Salamanders and Newts
Toads
Salamanders
Animals
New Mammals
A Wild Ferret Rise
Moss Echoes of Hunting
Behavior
Making Sense of Scents
Mice sense each other's fear
Lost Sight, Found Sound
Birds
Geese
Backyard Birds
Pigeons
Chemistry and Materials
Screaming for Ice Cream
A New Basketball Gets Slick
These gems make their own way
Computers
Seen on the Science Fair Scene
Programming with Alice
Look into My Eyes
Dinosaurs and Fossils
Winged Insects May Go Way Back
South America's sticky tar pits
The bug that may have killed a dinosaur
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
Earth
Wave of Destruction
Less Mixing Can Affect Lake's Ecosystem
Detecting an Eerie Sea Glow
Environment
Little Bits of Trouble
Acid Snails
Saving Wetlands
Finding the Past
Settling the Americas
Decoding a Beverage Jar
Salt and Early Civilization
Fish
Halibut
Lampreys
Salmon
Food and Nutrition
Recipe for Health
Chocolate Rules
Chew for Health
GSAT English Rules
Problems with Prepositions
Adjectives and Adverbs
Finding Subjects and Verbs
GSAT Exam Preparation Jamaica
GSAT Exam Preparation
2014 GSAT Results for Jamaican Kids
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
GSAT Exams Jamaica Scholarships
GSAT Practice Papers | GSAT Mathematics | Maths
42,000 students will sit for the GSAT Exam in two weeks
2014 GSAT Results for Jamaican Kids
GSAT Mathematics
Detecting True Art
Setting a Prime Number Record
GSAT Practice Papers | GSAT Mathematics | Maths
Human Body
A Sour Taste in Your Mouth
Football Scrapes and Nasty Infections
Taking the sting out of scorpion venom
Invertebrates
Jellyfish
Insects
Oysters
Mammals
Skunks
Pitbulls
Raccoons
Parents
Expert report highlights the importance to parents of reading to children!
Children and Media
How children learn
Physics
The Mirror Universe of Antimatter
Powering Ball Lightning
Speedy stars
Plants
Fungus Hunt
Assembling the Tree of Life
A Giant Flower's New Family
Reptiles
Gila Monsters
Cobras
Caimans
Space and Astronomy
A Dusty Birthplace
Zooming In on the Wild Sun
Black Holes That Burp
Technology and Engineering
Toy Challenge
Switchable Lenses Improve Vision
Are Propellers Fin-ished?
The Parts of Speech
What is a Verb?
Pronouns
Problems with Prepositions
Transportation
Ready, unplug, drive
How to Fly Like a Bat
Troubles with Hubble
Weather
Polar Ice Feels the Heat
Weekend Weather Really Is Different
Antarctica warms, which threatens penguins
Add your Article

Poison Dart Frogs

The poison dart frog, poison arrow frog, dart frog or poison frog, is the common name given to the group of frogs belonging to the family Dendrobatidae. Poison dart frogs are native to two geographical regions: Central America and South America. The Green and Black Poison Dart Frog (Dendrobates auratus) has been introduced to a few Hawaiian islands. Beautiful colored skin: 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. Beautiful but deadly: Poison dart frogs are a group of small, diurnal, and often brightly colored frogs native to Central and South America. These frogs received their common name from the numerous types of poisonous alkaloids found in the skin of many species. The most poisonous dart frog is the Golden Poison Dart Frog (Phyllobates terribilis). There are well over 100 different species of poison dart frogs, only few of which are 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). Certain tribes in South America, such as the Noanamá Chocó and Emberá Chocó indians of western Colombia, dip the tips of their blowgun darts in the poison found on the skin of three species of Phyllobates. In north Chocó, Phyllobates aurotaenia is used while to the south, in the departments of Risaralda and Choco, P. bicolor is used. In Cauca, even southern Cauca, P. terribilis is used for dart making. (Despite sometimes being called "poison arrow frogs" no examples are known of arrows, as opposed to darts, being poisoned with Phyllobates poison). No other species are used for this purpose. The poison is generally collected by roasting the frogs over a fire, but the toxins in P. terribilis are so strong that it is sufficient to dip the dart in the back of the frog without killing it. Highly effective toxins: When a wild animal is shot with a poison-tipped dart, it will die within minutes from the neurotoxin, making additional shots unnecessary to kill it. Poison darts made from either fresh or fermented batrachotoxin are enough to drop monkeys and birds in their tracks since nerve paralysis is almost instantaneous. No toxic insects, no toxic frogs: There is considerable evidence that toxicity in hese frogs is derived from their diet: primarily ants, mites, and beetles. These toxins are passed from the arthropod to the frog, then sequestered in glands on the amphibian's skin. Frogs brought from the wild into captivity and fed a regular captive diet, usually fruit flies or pin-head (hatchling) crickets, eventually lose their toxicity. Vile smells for defense: Species of the genus Aromobates has evolved another type of chemical defense: it is not toxic, but when frightened it secretes a sticky mucus which has an extremely vile odor suggestive of skunk sprayings which repels mammalian predators. The vernacular name "Skunk Frog" of the single species Aromobates nocturnus derives from this peculiar behavior.

Poison Dart Frogs
Poison Dart Frogs








Designed and Powered by HBJamaica.com™