カラス対策に使用されている画像データを公開いたします。
(これらの画像データは宮崎県日向市より許諾を得て掲載しているものです)
宮崎県・日向市では、これらの画像データをA3判に印刷して防水加工し、ネットに取り付けたところ、ごみ集積所の88%で効果があったとのことです。
※下記のPDFデータをダウンロードしてご使用ください。なお、カラスが慣れてくる場合があります。その場合、異なるパターンを使用することを推奨されております。
※効果を保証するものではありませんので、ご理解・ご了承のうえご使用ください。
We are making available image data used for crow-deterrence measures. (These images are published with permission from Hyuga City, Miyazaki Prefecture.)In Hyuga City, Miyazaki Prefecture, these images were printed on A3-sized paper, made waterproof, and attached to waste-collection nets. This approach proved effective at 88% of the waste-collection sites.
* Please download and use the PDF file provided below. Note that crows may eventually become accustomed to these images; in such cases, it is recommended to switch to a different pattern.
Scientific studies do not support the specific combination of red, yellow, and black as a unified deterrent strategy; rather, research highlights distinct, separate mechanisms for these colors in Japanese crow management.
- Yellow: A 2011 study by T. Sugita and reports from GAIAPRESS confirm that crows cannot see through a specific nuance of yellow plastic used for garbage bags.
This color blocks one of the four primary colors crows perceive, effectively hiding the food inside rather than scaring the bird away. - Black: Research published in the Journal of Ethology by T. Honda found that matte black lines increase collision risk and deterrence compared to metallic lines, as their lower visibility creates a greater hazard for the birds.
- Red: The provided search context does not contain specific studies supporting red as a primary color for crow deterrence in Japan; most cited deterrents rely on yellow visibility blocking, black collision risk, or reflective materials (like silver or blue) to create visual chaos.
https://www.gaiapress.com/en/article/525.html
