Several monarchs were flying around the garden with their bright orange and black wings.

monarchs 是 monarch 的复数形式。monarch 原指"君主、帝王"，这里指"帝王蝶"，因其翅膀颜色鲜艳如帝王服饰而得名。这种蝴蝶学名是 Danaus plexippus，因其迁徙行为壮观如帝王巡游而得名。