"Climatic warming does not improve insects 'chances of reproduction," says Chang Yung-jen. He even feels that the reduced rainfall this summer due to the small number of typhoons is affecting caterpillars' ability to pupate. "Many people who observe or photograph insects have the impression that caterpillar numbers are down this year," he says.
「氣候暖化沒有提供昆蟲更好的繁殖機會」，張永仁甚至感覺到，今年夏季颱風次數減少，雨水不足，影響了毛毛蟲蛻變，「許多觀察、拍攝昆蟲的人都覺得今年毛毛蟲少了。」