Grace and athleticism are optional for males in human courtship , but both are mandatory in manakin courting 人类在追求异性时，健壮和优雅也可以加分；但在侏儒鸟群里，这两者可都是必须的手段。
2.
Pairs of male lance - tailed manakins perform complex dances of “ leapfrog ” stunts and flight displays to woo interested females 两只雄长尾侏儒鸟一起表演高难度的“跳背舞”及特技飞行，以吸引雌鸟。
