Rattlesnakes is a group of venomous New World snakes, genera Crotalus and Sistrurus, which have a small noise-making jointed rattle on their tails. If not surprised, they will usually use this rattle as a warning device when they feel threatened. The rattle is composed of a series of nested, hollow beads which are actually modified scales from the tail-tip. Each time the snake sheds its skin, a new rattle segment is added. Since they may shed their skins many times a year (depending on food supply and consequent growth rates), and since the rattle can and does break, there is no truth to the claim that one can tell a rattlesnake's age from the number of rattles. There are about 30 species, with numerous subspecies. Rattlesnakes are pit vipers. Pit vipers have heat-sensitive pits between the eye and the nostril that enable them to find prey very effectively. Pit vipers also have fangs in the upper part of the mouth that fold in when not in use. When a pit viper attacks, it unfolds the fangs, bites, and injects its venom.













Page1


Rattlesnake bites are generally not fatal for adult humans, if promptly and properly treated. Most (but not all) rattlesnake venom is primarily hemotoxic, meaning it is essentially digestive, destroying tissue and is often very painful. Some degree of permanent scarring is very likely, even with prompt, effective treatment, and a severe envenomation combined with delayed or ineffective treatment can lead to loss of a limb; a rattlesnake bite is always a potential serious injury. Some rattlesnakes, especially the tropical species, have primarily neurotoxic venom. A bite from these snakes may not be very painful, but the venom can interfere with the function of the heart, and can paralyze the lungs. Prompt treatment is essential for any victim of a rattlesnake bite. Different species of rattlesnake vary significantly with respect to temperament. Some are relatively docile, while some are quite aggressive when challenged.

Above Images Are From The US Fish & Wildlife Service



Aligator
Dinosaur
Frog
Komodo Dragon
Lizard
Sea Turtle
Snake
Toad
Tortoise
Turtle
MORE...


Carp
Catfish
Crab
Crayfish
Eel
Largemouth Bass
Lobster
Minnow
Pike
Octopus
Perch
Salmon
Sea Horse
Starfish
Stingray
Sunfish
Trout
Tuna
MORE...









All text contained in Animaltrek.com is licensed to the public under the GNU Free Documentation License (GFDL). All Information is courtesy of Wikipedia.
Copyrights | Privacy Policy | © 2005 FUN GROUP INC.