An oval black beetle 4-6mm long with a white spot on each wing case. Grubs are about 6mm long, with a tuft of golden hairs on the end of their bodies. They can often be detected by their cast-off skins as they moult. Grubs feed on fur, hair, skins, feathers and wool and may damage upholstery.
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A small brown beetle, 2.5-5mm long, that is the adult form of woodworm. Emerges from infested wood between May and September, especially in June and July, leaving round exit holes 1-2mm in diameter.
A tiny speck of “living dust”. If the dust gets up and walks away from you, it is Furniture Mites. About 0.5mm long, with eight tiny legs, they infest certain types of upholstered furniture – especially vegetable fibres in damp conditions. May cause an allergic reaction in sensitive people.
The insect normally referred to as a gnat is actually a small mosquito – correct name: Culex pipiens. It is common in gardens on warm evenings. Another species, the true Window Gnat, is a slow-flying insect about 8mm long with wings more rounded than those of the mosquito.
The wings are strongly veined with dark tips. Eggs of the Window Gnat are laid on rotting fruit or vegetables or other moist food and the larvae may contaminate home-made wines or honeycombs.
It is one of several species known as “filter flies” which breed in sewage filters; so homes near to sewage works may be invaded by them.
Large buzzing flies about 9mm long with a characteristic bottle-green sheen on the back. Mostly carrion feeders that enter houses to seek places to hibernate and, in passing, may well alight on exposed foodstuffs.
Various large black or violet beetles that occasionally wander in from the garden or emerge from under door-mats. The larger ones grow up to 25mm long.
They are harmless and no treatment is necessary.