JESKE, Clinton W; PERCIVAL, H Franklin. Time and energy budgets of wintering Ring-necked Ducks Aythya collaris in Florida, USA. Wildfowl, [S. l.], p. 109–118, 1995. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154664. Acesso em: 16 dec. 2025.