Spiders are not the only arachnids; other orders include mites and ticks, scorpions, and many strange and obscure creatures, like pseudoscorpions. These tiny, harmless creatures look like mites with scorpion claws. They’re not uncommon, but so tiny that they’re rarely seen. I have found several (like this one) under rocks in my front yard, where they face off with oribatid mites and tiny baby centipedes.