The male Wood Duck (Aix sponsa) is perhaps the most colorful of the North American waterfowl.  Nests are in cavities in trees either over water or not too far.  When the ducklings hatch they must jump out to the land or water.  Wood Ducks were in serious decline by the late 19th century and had disappeared from much of their range.  The Migratory Bird Treaty Act of 1918 and regulations on hunters allowed them to slowly recover and are doing well now, so they are the 2nd most hunted duck after the Mallard.  Beavers create an ideal environment for them by creating forested wetlands, their most natural habitat.  This gallery has photos and/or videos of males, females, singly, paired, mating,  feeding and preening, adults and immatures, also with families.  Some shots show how a Canada Goose gosling threatens and attacks a family.