Wood ducks depend upon forested wetland habitat for food and cover, although marshes are also used. Breeding range must have trees for nesting cavities and food near permanent freshwater lakes and streams. Brushy borders are important for nesting and brooding. Swampy areas with cypress and gum are premium for roosting. The best habitat contains mast-producing hardwoods that border streams and permanent fresh-water lakes. Many beaver ponds provide ideal wood duck habitat.