The first pair is often actually a pair of claws. These members of the class arachnida are widely known. They have five pairs of legs including two claw like appendages in front. The tail end of the cephalothorax has seven segments and the abdomen has five with a stinger at the end. On the underside of the second segment in the tail there is a pair of comblike structures called pectines whose function is not known.
Scorpions are nocturnal and prefer warm, dry climates.
A unique feature of scorpions is that their young are born alive, not as eggs. For a period immediately after birth they are carried on the mother's back. It may take several years for a scorpion to reach adult hood. These arachnid members go by the common names of 'daddy longlegs' or 'harvestmen'. They are not true spiders.