a short-lived slender insect with delicate transparent wings and two or three long filaments on the tail. It lives close to water, where the chiefly herbivorous aquatic larvae develop 蜉蝣
Order Ephemeroptera: several families and many species 蜉蝣目,数科,多种 ■an artificial fishing fly that imitates such an insect 蜉蝣形钓饵