Woodworm is a generic description given to the infestation of a wooden item (normally part of a dwelling or the furniture in it) by the wood-eating larvae/grubs of one of many species of beetle. A woodworm is not a specific species. It is the larval stage of certain woodboring beetles including: Signs of woodworm usually consist of holes in the wooden item, with live infestations showing powder (faeces) around the holes. The size of the holes varies, but are typically 1mm to 1.5mm in diameter for the most common household species. Adult beetles which emerged from the wood may also be found in the summer months. Typically the adult beetles lay eggs on, or just under the surface of, a wooden item. The resulting grubs then feed on the wooden item causing both structural and cosmetic damage, before pupating and hatching as beetles which then breed, lay eggs, and repeat the process causing further damage.