Pseudoscorpions are generally very small animals. This is vividly illustrated the middle photo immediately below -- the pseudoscorpion is putting its pincers (pedipalps) through the holes on a Belgian postage stamp! Interestingly, the pedipalps of these creatures possess a poison gland; however they are not dangerous to humans. Most of the species depicted below are very rare cave dwellers. However, there are many common species which may be found, for instance, under tree bark.
modified November 27, 2009