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We have investigated the mechanism of a bristled wing of thrips by using an artificial cantilever-based wing. Five kinds of the artificial bristled wing, which had the similar size of the thrips wing, with a different hair gap were evaluated in a wind tunnel. Experiment results suggested that at low hair-gap-based Reynolds number (<;10), the bristled areas of the wing acted as an imaginary airflow block, which increased the aerodynamic force. Meanwhile, this phenomenon did not occur at high Reynolds number (>100).