小红蛱蝶，又称「小红蛱蝶」，是一种蛱蝶，属鳞翅目蛱蝶科。可能是世界上分布最广的蝴蝶，分布于除了南极洲以外的所有大陆，包含太平洋中央的夏威夷。

展翅长5.1 - 7.3 公分。翅膀背面橘、褐色；翅端黑色，有明显的白带和小白点。翅膀腹面颜色暗淡，褐或灰色。

Vanessa cardui is a well-known colourful butterfly, known as the painted lady, or in North America as the cosmopolitan. This butterfly has a strange pattern of flying in a sort of screw shape.