Wednesday, February 6, 2008

It is a Scorpion

SCORPION, common name for any member of the ARTHROPOD order Scorpionida, class Arachnida, the class that also includes spiders and mites. About 1400 species of scorpion exist; about 40 of them occur in the U.S. Usually brown in color and ranging from about 2.5 to 20 cm (about 1 to 8 in) in length, the scorpion has a flat, narrow body, two lobsterlike claws, eight legs, and a segmented abdominal tail. Terminating in a venomous stinger supplied by a pair of poison glands, the tail is usually curved upward and forward over the back.

Found in warm and dry tropical regions, including the southwestern U.S., the scorpion is nocturnal and feeds mainly on spiders and insects. The young are born live and remain with the mother for a short period. When capturing a victim with its claws, the scorpion inflicts a disabling sting with its tail. In most species the sting is painful, but not fatal, to humans, although the sting of the U.S. species Centrureides sculpturatus has proved fatal to young children and is potentially fatal to adults. Other areas of the world have more dangerous scorpion species; the poison involved is a neurotoxin, attacking the nervous system.