Bed bugs are small, oval, brownish insects that feed on the blood of animals or humans. Adult bed bugs have flat bodies about the size of an apple seed. After feeding, however, their bodies swell and are a reddish color. Best temperature for bed bugs breeding is 25°C to 35°C, hence they are active in summer season. They are mostly found in wooden beds, chairs and other wooden articles because the temperature of wood hardly changes compare to metal articles. During day time bed bugs hide in tiny cracks and crevices and feed on blood at night.
Bed bugs have small wings but not developed for flying, they can move quickly over floors, walls, and ceilings. Female bed bugs may lay hundreds of eggs, each of which is about the size of a speck of dust, over a lifetime.