In some Swiss valleys the European lesser horseshoe bat began to vanish after streetlights were installed, perhaps because those valleys were suddenly filled with light-feeding pipistrelle bats.

瑞士给谷安装了路灯之后，欧洲较少数的菊头已经消失，这很有可能是谷中突然充路灯给食的麦氏油的缘故。