PROBLEM TO BE SOLVED: To provide means for detecting easily a mounting behaviour or the like.SOLUTION: In a mounting behaviour detection system including a device 10 on a mounting side fitted to a neck of one livestock, for emitting a transmission signal, and a device 20 on a mounted side fitted on some position between a back and a tail of another livestock, a communication part of the device on the mounted side emits a response signal toward a communication part of the device on the mounting side by using energy emitted from the device on the mounting side.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】乗駕行動等を容易に検出する手段を提供する。【解決手段】一の家畜の首に取り付けられ、発信信号を発する乗駕側装置10と、他の家畜の背中から尾までいずれかの位置に取り付けられた被乗駕側装置20とを含み、被乗駕側装置の通信部が、乗駕側装置から発せられたエネルギーを用いて乗駕側装置の通信部に向かって応答信号を発する。【選択図】図1
