Entomological box housing a collection of spiders, degraded by small invertebrates. This photograph shows how small invertebrates (Beetles, moths) can degrade mounted specimens or preserved in boxes of zoological collection (here spider Tropical) . This is the role of curators seek to limit and control these risks, the chemical means (miticides, insecticides, fungicides) or a series of freeze / thaw periods and precise temperatures to kill unwanted organisms as adults and larvae (eggs are often more resistant) This box kept at educational title comes from the naturalists collections of Lille natural history Museum.