cow.bird
n.（名词）Any of various blackbirds of the genusMolothrus, especially the common North American species M. ater, that lay their eggs in the nests of other birds and are often seen accompanying herds of grazing cattle. 牛鹂：任一种牛鹂属 .的黑色鸟类，尤指北美洲常见的 褐头牛鹂 ，在其他鸟类的巢中下蛋，并经常可以看到它们和草场上的牛群在一起
来源：[From their habit of staying with cattle] [由于它们跟随牛群的习性而得名]
