Bed bugs belong to the Cimicidae family. This family is composed of more than 100 species that feed on the blood of birds and mammals.
Two species live exclusively off humans: Cimex lectularius, which lives mainly in temperate zones, and C. hemipterus (F.), which is mainly found in tropical areas.
Before eating, bed bugs are brown or yellowish brown. Once they have fed on blood, they become reddish brown and resemble small apple seeds. Their heads include highly specialized piercing-sucking mouthparts. Generally, the tip of the male’s abdomen is pointed and the tip of the female’s abdomen is rounded.