Many female birds do not share the same brightly colored plumage as the male of the species.The female Cassowary, on the other hand, does and is stronger and bigger than the male.

• 自然界中许多雄鸟的羽毛都比雌鸟来的漂亮，鹤鸵却恰恰相反，雌鹤鸵的羽毛更为丰满光艳。