The bed bug trap has more than one trapping area, each trapping area associated with one or more discrete bed bug sources, such that finding a bed bug in one particular trapping area indicates that the bed bug must have arrived there from one or more specific sources, whereas finding a bed bug in another particular trapping area indicates that the bed bug must have arrived there from one or more other specific sources. The bed bug trap may also be provided with bed bug attracting means, which may include heat, and/or chemical attractants, and/or carbon dioxide. In some embodiment, the bottom surface of the trapping area may be sloped towards one or more accumulation areas for easier inspection.