In the long and seemingly futile quest to build a better roach trap, researchers identified the come-hither chemical of the female German cockroach a

The German cockroach is originally from Asia and very common in Russia, not in Germany. It is very closely related to the Asian cockroach, and to the casual observer they appear nearly identical and may be mistaken for the other. This cockroach can be seen in the day occasionally, especially if there is a large population or if they have been disturbed. However, sightings are most commonly reported in the evening hours as they are most active at night.