To provide a birdproof tool hardly causing the accustomedness to seabirds and capable of sustaining bird proof effects for a long period.
This birdproof tool for seabirds is obtained by using a long unit having ≥30 cm2 cross-sectional area, ≥100 cm length at the time of the maximum extension, 150-1,500 g/100 cm (at the time of the maximum extension) weight thereof and ≥10 kg tensile strength in the axial direction and stretchable in the longitudinal direction therein. The shape of the long unit is preferably a circular cylindrical, a cylindrical, a prismatic or a polygonal cylindrical shape. The structure of the long unit is preferably formed into a bellows structure prepared by covering the outer surface of a coil spring with a rubber-like material, a synthetic resin or a metal material.
KAMITSUBARA YUZURU
SHUDO KAZUMICHI
CHISSO CORP
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