PROBLEM TO BE SOLVED: To reliably repel harmful animals from a farmland area without making the harmful animals get used.SOLUTION: A system includes: multiple detection units 2 arranged at predetermined intervals at the outside of a farmland area 1 and for detecting a harmful animal 4 invading the farmland area 1； a small unmanned aircraft 3 capable of flying three-dimensionally； an intimidating unit provided in the unmanned aircraft 3 and for intimidating the harmful animal 4； and a recognition unit provided in the unmanned aircraft 3 and for recognizing the harmful animal 4. The unmanned aircraft 3 (i) starts a flight on the basis of detection of the detection unit 2, and (ii) intimidates the harmful animal by the intimidating unit and repels the harmful animal from the farmland area 1 on the basis of recognition of the recognition unit while approaching and tracking the harmful animal 4.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】害獣が慣れることがなく、害獣を確実に農地領域から追い払うこと。【解決手段】農地領域１の外側に所定の間隔を置いて配置されると共に、農地領域１に侵入する害獣４を検知するための複数の検知部２と、立体的に飛行可能な小型の無人航空機３と、無人航空機３に設けられると共に、害獣４を威嚇するための威嚇部と、無人航空機３に設けられると共に、害獣４を認識するための認識部と、を備え、無人航空機３は、（ｉ）検知部２の検知に基づいて飛行を開始し、（ｉｉ）認識部の認識に基づいて害獣４に近づいて追跡しながら、威嚇部で害獣を威嚇して、害獣を農地領域１から追い払う。【選択図】図２
