Stock photography, photos: Gadwall (Anas strepera) Male Stock photos of Gadwall (Anas strepera)Male Photograph: © Jack Milchanowski Click for a larger image and more information Keywords associated with this stock photo: animal, aquatic bird, bird, duck, fowl, natural, natural world, nature, ornithology, untamed, water, waterfowl, web-footed, wild, wildlife, Zoology