https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/4024855
Mallard Drake.
The green head and yellow bill of the mallard duck is a familiar sight to many people living in the Northern hemisphere. In fact, the mallard is thought to be the most abundant and wide-ranging duck on Earth. Original public domain image from Flickr
Public DomainFree CC0 image for Personal and Business use