According to Mireya Manfrini and Claudius Soda, of the Entomological Research center of the National University of Cordova, in Argentina, it is possible to be spoken of three groups, taking care of his possible danger for archives specifically and libraries. In a first group they would be the underground thermites, that create their nests in the ground and underground penetrate in the building, damaging wood and paper. In the second group the thermites would be located that require means with high humidity, but they adapt well to libraries because the paper offers minor resistance that the wood. – Finally, are the dry wood thermites, whose more dangerous representative, the Cryptotermes brevis, lives in beams, wood furniture, floors, etc. and destroy practically all the interior of the piece lodges that them. Aside from cellulose, they eat leather and parchment, and although they cannot live in atmospheres droughts very, hold the air conditioning well. But the thermites are not the unique danger. The cockroaches also make much damage and are common in libraries and archives the black cockroach, the blonde and the American or cucarachn, that can arrive at the 5 centimeters of size.
The damage that produces to books can be very serious, mainly in tropical regions, where it attracts them to the paper by his humidity. In addition, they eat the cardboard, they scrape labels in the backs of books, attack its binding and they soil the paper with its depositions.Also, other as common insects as ants, wasps, bees, bumblebees, etc. do not damage the paper directly, but they indirectly harm when constructing its nests or to place its eggs in him. As far as the butterflies and polillas, they are its larvae or caterpillars those that can attack works, since they own masticador buccal apparatus. A species of cricket, the Gryllus damesticus, also consumes paper, as well as fabric, leather and glues and, sometimes, are voracious.