I also had trouble contacting an expert. The librarians were very helpful. They do it by rubbing certain parts of their body together. They also glow bright colors under ultraviolet lights. Some scorpion's venom can be used as a medicine.
Some scorpions have huge pinchers.
That causes their venom to be less dangerous. Only fifty of the one thousand two hundred species of scorpions are deadly. Pseudoscorpions have huge pinchers but no stinger. They also can make silk like spiders for secure hideaways. Another interesting scorpion is the Tailed Whip scorpion.