북반구에 흔히 서식하는 야생 오리로, 수컷은 머리가 광택이 나는 초록색이며 대부분의 집오리의 조상이다.
A common wild duck of the Northern Hemisphere, known for the male's iridescent green head and being the ancestor of most domestic duck breeds.
예문:
"A flock of mallards landed gracefully on the surface of the frozen lake."
"The male mallard is easily recognizable by its bright green head and yellow bill."
"Many domestic ducks are descendants of the wild mallard."