Mute swans are voracious feeders of submerged aquatic vegetation, with each adult swan consuming up to 8 pounds per day, and destroying much more in the process. SAV is an important part of aquatic ecosystems as it provides food and shelter for native waterfowl, fish, and invertebrates. By consuming massive amounts of SAV, mute swans negatively impact the structure and function of aquatic habitats native species depend upon. Additionally, mute swans are aggressive towards other birds. Mute swans disrupt nesting activity of native waterfowl by chasing birds from their nests and have been reported to physically injure, or even kill, other birds.