Abstract: A system (100) for monitoring the presence and activity of rodents and other pests comprising a base station (120) and a plurality of remote stations (11) which may be installed at positions around the premises to be monitored. Each remote station comprises a baited housing through which a rodent would pass. If a trap (20) is actuated it causes a signal to be transmitted to a base station (120) which in turn transmits an SMS message to a cellular telephone network (140). The system will determine which of the remote stations has been activated and will provide data as to the manner of activation. The system enables operators to monitor pest activity in premises such as food manufacturing facilities in order to control the presence and activity of such pests without the need for regular and frequent inspections of the remote stations.