Insects

All of the 2000 known species of Psocoptera range between small (never more than 6mm) to practically invisible. Several species have adapted to an indoor life living among dried material such as undisturbed books where they feed on minute quantities of mould growing on the paper.

Psocidae sp. - Cheshire, England - August 2009

Most of the outdoor species found in Britain belong to 2 families: the Psocidae and the Caeciliidae.