Any of various wading and swimming birds of the family Rallidae, frequenting swampy regions and characteristically having dark, iridescent plumage and a red bill tipped with yellow.

• 红骨顶，秧鸡一种秧鸡科可涉水和游泳的水鸟，经常出没于沼泽地带，具有深色且耀眼的羽毛，尖端为黄色的红鸟喙