Why are bed bugs mostly active at night?
An astute question! The common bed bug, Cimex lectularius, has adapted to feed when its preferred host - humans - is at rest. At night, our bodies provide steady warmth, steady carbon dioxide plumes from breathing, and minimal movement, all of which are cues to signal that dinner is served. This nocturnal behavior is an evolutionary advantage: fewer disturbances, safer feeding, and a better chance to go unnoticed. That said, in severe infestations or unusual conditions, bed bugs may bite during the day as well - their hunger outweighs their habits. Nature always finds a way.
An astute question! The common bed bug, Cimex lectularius, has adapted to feed when its preferred host - humans - is at rest. At night, our bodies provide steady warmth, steady carbon dioxide plumes from breathing, and minimal movement, all of which are cues to signal that dinner is served. This nocturnal behavior is an evolutionary advantage: fewer disturbances, safer feeding, and a better chance to go unnoticed. That said, in severe infestations or unusual conditions, bed bugs may bite during the day as well - their hunger outweighs their habits. Nature always finds a way.