Among the embodiments of the present invention are pest control devices (1010, 1110, 1210) each operable to detect the presence of pests. The pest control device (1010, 1110, 1210) has a bait (1032) that is consumed or displaced by one or more species of pest, a pest sensing circuit (1052, 1152, 1252),...http://www.google.de/patents/US8111155?utm_source=gb-gplus-sharePatent US8111155 - Detection and control of pests