PROBLEM TO BE SOLVED: To provide a bird invasion prevention device effective for preventing invasion of birds into an architectural structure, and bird injury in the architectural structure.SOLUTION: A bird invasion prevention device includes: a plurality of slender flexible long-sized members； and a hanging member for detachably hanging a plurality of long-sized members in a plurality of rows with a clearance so as to block an opening of an architectural structure, in which each of the long-sized members is configured to be removed from the hanging member when a tensile equal to or load higher than a prescribed value is applied thereto.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】建築物内への鳥類の侵入および建築物内での鳥害を防止するのに有効な鳥類侵入防止装置を提供すること。【解決手段】複数の細長い可撓性長尺部材と、前記複数の長尺部材を建築物の開口部を塞ぐように隙間をもって複数列でかつ各々を着脱可能に吊り下げる吊り下げ部材とを備え、各長尺部材は、所定値以上の引張荷重がかかると前記吊り下げ部材から離脱するように構成されたことを特徴とする鳥類侵入防止装置。【選択図】図１
