Giles, N. “Effects of Increasing Larval Chironomid Densities on the Underwater Feeding Success of Downy Tufted Ducklings Aythya Fuligula”. Wildfowl (January 1, 1990): 99–106. Accessed December 17, 2025. https://tidsskrift.dk/Wildfowl/article/view/154041.