Mute swans are an invasive species in many regions, including North America, Europe, and Australia. Their arrival can negatively affect native birds in several ways:
Competition for Resources: Their large appetite for aquatic plants reduces food availability for native species with similar diets.
Aggressive Behavior: During breeding season, they defend territories aggressively, displacing native waterfowl from nesting and foraging areas.
Disease Transmission: They can carry diseases such as avian influenza and waterfowl cholera, which can devastate native bird populations.
Habitat Alteration: Uprooting aquatic plants changes wetland vegetation structure, affecting birds that rely on specific plants.
Changes in Ecosystem Function: Their feeding can alter water quality, nutrient cycling, and biodiversity.
Managing mute swan populations is crucial to preserving native biodiversity.