Some mother rattlesnakes care for their young after they are born. Male and female tarantulas look alike when they are young and continue to look alike when they become adults. Desert tarantulas are very aggressive and are easily provoked. A tarantula's normal life span is about 2 years. Tarantulas, like snakes, molt by crawling out of their outer skins and leaving them behind.
Scorpions are arthropods with six legs and stingers on the ends of their tails.
Bark Scorpions are the only common Arizona scorpions with venom potentially dangerous to people. Mother scorpions take good care of their babies and they carry their babies on their backs. Mother scorpions usually lay about 10 eggs and hatch about 8 babies. Scorpions hunt their prey. When they catch it they inject it with venom to kill or paralyze it.