Gadwall are elegant dabbling ducks that breed on wetland reserves and winter in large numbers. Their welfare depends on clean shallow water with aquatic vegetation.
Gadwall welfare is closely tied to aquatic vegetation quality in their foraging habitats. Eutrophication from agricultural nutrient run-off promotes algal growth that suppresses the aquatic plants gadwall depend on. Maintaining clear, nutrient-poor water in reserves supports the plant communities they need. Their population success shows what protection and habitat management on reserves can achieve for a duck species that requires specific aquatic conditions.