John M. Eadie is an associate professor of zoology at the University of Toronto. He received his B.Sc. from the University of Western Ontario, London, his M.Sc. from Queen’s University, Kingston, and his Ph.D. from the University of British Columbia, Vancouver. His research interests focus on the behavioral ecology, population genetics, and evolutionary ecology of birds, particularly waterfowl. He studied Common Goldeneyes in northern Ontario for 2 years and then initiated a long-term (10 yr) study of Common and Barrow’s goldeneyes in the Cariboo Parkland of British Columbia. Additional research includes studies of obligate brood parasitism in the Black-headed Duck (Heteronetta atricapilla) of Argentina, population genetics of sea ducks, behavioral development of Trumpeter Swans (Cygnus buccinator), and community dynamics of secondary cavity-nesting birds. He lives in Ontario with his wife, Jane, and daughters Selina, Sarah, and Katherine. Current address: Division of Life Sciences, Scarborough Campus, University of Toronto, Scarborough, ON, Canada, M1C 1A4.
Mark L. Mallory is presently a wildlife biologist with the Canadian Wildlife Service. He holds a B.Sc. from Queen’s University, Kingston, and an M.Sc. from Carleton University, Ottawa. Mark has worked on Common Goldeneyes and other boreal waterfowl species since 1983 as part of the Canadian Wildlife Service’s (Ontario Region) long-term study (1980 to present) of the effects of acid precipitation on aquatic wildlife in central and northeastern Ontario. His research interests include behavioral ecology of Common Goldeneyes and other boreal waterfowl, and particularly how populations can be affected by human activities. He lives in Ontario with his wife, Carolyn, son Conor, and daughters Jessamyn Olivia. Current address: Canadian Wildlife Service (Ontario Region), 49 Camelot Dr., Nepean, ON, Canada, K1A 0H3.
Harry G. Lumsden is retired from the Wildlife Research Section of the Ontario Ministry of Natural Resources. He worked on Common Goldeneyes in Ontario through much of the 1970s and 1980s. His current interests are the biology of swans and the restoration of Trumpeter Swans to Ontario. Current address: 144 Hillview Rd., Aurora, ON, Canada, L4G 2M5.
Order of authorship was determined by mean daily vocalization rate (adjusted for mean daily heart rate).
