Ducks and waterfowl by John Gould. This screensaver contains 52 images of ducks and waterfowl from some of the most magnificent books of ornithological art produced in the 1800s by John Gould. It features: ducks, geese, grebe, crane, heron, pelican, auk, egret, gannet, commorant, gull, swan and others. John Gould, along with Audubon, was one of the greatest bird artists of the 1800s.