To notify a capture status of a bird and a beast without delay while reducing a power consumption of a relay station battery.SOLUTION: A relay station 100 comprises a wireless communication unit 160 and a start-up control unit 172. The wireless communication unit 160 repeatedly starts up and stops, and performs data communication with other wireless communication units during start-up. When illuminance measured by an illuminance sensor 110 is equal to or higher than reference illuminance, the start-up control unit 172 performs a control to increase a time period from when the wireless communication unit 160 is stopped until the wireless communication unit starts up in response to a decrease of the illuminance； and when illuminance is less than the reference illuminance, the start-up control unit performs a control to shorten a time period from when the wireless communication unit 160 is stopped until the wireless communication unit starts up.SELECTED DRAWING: Figure 4【課題】中継局のバッテリーの電力消費量を抑えつつ、鳥獣の捕獲状況を遅延なく通知すること。【解決手段】中継局１００は、無線通信部１６０と、起動制御部１７２とを有する。無線通信部１６０は、起動および停止を繰り返し、起動中に他の無線通信部との間でデータ通信を実行する。起動制御部１７２は、照度センサ１１０に測定された照度が基準照度以上である場合に、照度の低下に応じて、無線通信部１６０が停止してから起動するまでの期間を長くする制御を行い、照度が基準照度未満となる場合に、無線通信部１６０が停止してから起動するまでの期間を短くする制御を行う。【選択図】図４
