Bed bugs are flat, reddish-brown, oval insects up to 4 to 5 mm long or the size of an apple seed. Swollen and reddish after a blood meal. Bed bugs only feed on blood. Under cool conditions, bed bugs have been able to survive up to a year without a meal. They prefer to be more active at night when the host is asleep. Bed bugs are found in cracks and crevices, including mattress seams, sheets, furniture, behind baseboards, electrical outlet plates and picture frames. Often found in hotels, where they can travel from room to room and in visitors’ luggage or other personal belongings such as purses and briefcases.