The tail of a scorpion fly isn't a stinger, it's the male scorpion fly's genitals! Scorpion flies live in green spaces such as parks and eat dead insects, which they creepily steal from spider webs.
Oddly enough, sun spiders, which are also called wind scorpions or camel spiders ... focus their hunting efforts on other arthropods and insects, making them valuable predators in their ecosystems.