KOMODO DRAGON USE POISON TO KILL THEIR PREY
Komodo Dragons 'use poison to kill their prey'
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Komodo Dragons use poison to kill their prey, making them potentially more deadly than previously thought, scientists have found.
Scientists thought that the reptiles, which bite their prey and then let them go, allowing them to bleed to death, used only the bacteria from their mouths to hasten their victims' end.
But a new study shows that they use snake-like venom, making them the world's largest poisonous lizard.
"The view that the Komodo routinely kills using dirty oral bacteria is wrong," said Dr Stephen Wroe from the University of New South Wales in Australia, a co-author of the report. "The dragon is truly poisonous. It has modified salivary glands that ... allows it to kill large animals through rapid blood loss."
The toxin is similar to that of many snakes, the researchers found.
It prevents blood from clotting and widens blood vessels, sending the dragon's prey into shock, the findings, published in the Proceedings of the National Academy of Sciences (PNAS) journal, show.
The research adds to growing proof that many lizards may use snake-like venom to attack their victims.
Until recently scientists thought that there were only two types of poisonous lizards, the Gila monster and Mexican beaded lizard, both found in the Southern states of America and in Mexico.
Found in Indonesia, the Komodo dragon can grow to a length of 10 feet.
But it has a much weaker bite than a similar sized crocodile, researchers found.
The team also looked at fossils of Megalania, a 30-foot-long extinct relative of the Komodo dragon that lived 40,000 years ago, which they believe is probably the largest venomous animal that ever lived.
Scientists thought that the reptiles, which bite their prey and then let them go, allowing them to bleed to death, used only the bacteria from their mouths to hasten their victims' end.
But a new study shows that they use snake-like venom, making them the world's largest poisonous lizard.
"The view that the Komodo routinely kills using dirty oral bacteria is wrong," said Dr Stephen Wroe from the University of New South Wales in Australia, a co-author of the report. "The dragon is truly poisonous. It has modified salivary glands that ... allows it to kill large animals through rapid blood loss."
The toxin is similar to that of many snakes, the researchers found.
It prevents blood from clotting and widens blood vessels, sending the dragon's prey into shock, the findings, published in the Proceedings of the National Academy of Sciences (PNAS) journal, show.
The research adds to growing proof that many lizards may use snake-like venom to attack their victims.
Until recently scientists thought that there were only two types of poisonous lizards, the Gila monster and Mexican beaded lizard, both found in the Southern states of America and in Mexico.
Found in Indonesia, the Komodo dragon can grow to a length of 10 feet.
But it has a much weaker bite than a similar sized crocodile, researchers found.
The team also looked at fossils of Megalania, a 30-foot-long extinct relative of the Komodo dragon that lived 40,000 years ago, which they believe is probably the largest venomous animal that ever lived.
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