PROBLEM TO BE SOLVED: To provide a harmful bird-repelling tool not giving adverse effects, such as light, noise to human bodies, capable of continuously maintaining the effects for preventing the rounding of harmful birds especially crows, and of being installed at various locations, and which is also installed readily and recovered and improved in safety, during use after its installation.SOLUTION: This harmful bird-repelling tool is such that it is formed by forming a circular part 1a formed as a ring on the one-end side of a wire material 1, obtained by giving a twisted rotation on a monofilament made of a synthetic resin having a polygonal cross-sectional shape, to form a helical ridge line, and also constituting the bonded part 1b of the wire material end at the circular part side with the body part of the wire material, as being capable of free and detachment via a grip part 2.COPYRIGHT: (C)2009,JPO&INPIT【課題】人体に光や騒音などの悪影響を与えることなく、害鳥、特にカラスが群がることを防止する効果を持続的に維持することができ、種々の場所への設置が可能であるのに加え、設置および撤収が容易で、設置後使用時の安全性を高めた害鳥忌避具の提供。【解決手段】断面形状が多角形の合成樹脂製モノフィラメントに捻り回転を付与して外面にらせん状稜線を形成してなる線材1の一端側に、リング状に賦形された円形部1aを形成すると共に、この円形部側の線材端と線材本体部の結合部1bとを、把持部2を介して着脱自在に構成したことを特徴とする害鳥忌避具。【選択図】図1
