Psocids thrive in damp, warm undisturbed environments.
The feed on microscopic molds which mainly develop on certain types of wallpaper and book bindings. Occasionally they infest areas where Spanish moss or other vegetable matter has been used to make upholstered furniture. They are each the size of a pinhead and are found in groups. Many times they have wings, and when you do see them they will be running along in a jerky manner. They do not bite or cause disease organisms, and although they leave they contaminate infested areas with their body parts, they do not do other damage.