Scorpions are arachnids, and like most arachnids, they walk on four pairs of jointed legs. There are over 1,700 different scorpion species, and only 25 species are poisonous. Certain species of scorpions, such as the tailless whip scorpion, walk sideways and others, such as the bark scorpion, prefer to climb and can orient to walking upside down.
Scorpions are nocturnal and hunt for prey during the night. They move quickly when threatened and take a defensive stance by curling up their bodies and displaying the venomous stingers of their tails high above. When stinging, a scorpion precisely pounces, often stinging multiple times before escaping.