Problem to be solved: to provide a bird flight prevention device capable of facilitating the installation with a simple structure and disrupting avian biomaterials to enable the effect of preventing the flying in a wide range.A bird flight prevention device has a rotary propeller body 40 having a propeller blade 42 at its front end, and a horizontal shaft 20 having a tail body 60 having a tail blade 61 at its rear end is turnably attached to the upper end portion of the column 10 through a connection body 30 and is different from the ground magnetic field to the propeller body A magnet body 50 for generating a normal magnetic field is mounted.Diagram【課題】簡易な構成で設置が容易であると共に、鳥類の生物磁石を混乱させて飛来防止効果を広範囲に作用させることができる鳥類飛来防止装置を提供する。【解決手段】鳥類飛来防止装置は、前部にプロペラ羽根４２を備える回転自在なプロペラ体４０を有し、後部に尾翼６１を備える尾翼体６０を有する水平軸２０を、支柱１０の上端部に連結体３０を介して回動自在に垂設し、プロペラ体に、地磁場と異なる異常磁場を発生させる磁石体５０を取り付けて構成される。【選択図】図１
