Identification
for Bed Bug
An adult is a flat, oval, wingless insect, so it cannot fly. Size estimates cluster around a quarter inch: UF/IFAS gives 6 to 9.5 mm, and Penn State Extension lists adults at about a quarter inch [UF/IFAS; Penn State Extension]. Unfed, the body is brownish and thin; a blood meal leaves it swollen and reddened. Source: https://ask.ifas.ufl.edu/publication/in297 Source: https://extension.psu.edu/biology-habitat-and-management-of-bed-bugs The youngest nymphs are about 1/16 inch (roughly 1.6 mm) and so pale they look nearly colorless, but they already carry the adult outline. Source: https://extension.psu.edu/biology-habitat-and-management-of-bed-bugs Source: https://ask.ifas.ufl.edu/publication/in297