The Breeding Ecology of the Trumpeter Swan (Olor Buccinator Ricahrdson) In Yellowstone National Park

This report summarizes the first of two field seasons investigating habitat selection, productivity, and human disturbance of Trumpeter Swans nesting in and near Yellowstone National Park (YNP). The study is supported by the Montana Cooperative Wildlife Research Unit, the National Park Service, the National Wildlife Federation, the Northern Rocky Mountain Cooperative Park Study Project, the Trumpeter Swan Society, and the Wildlife Management Institute. I wish to thank the personnel of the Biologist's Office, YNP, and of the Montana Cooperative Wildlife Research Unit for their vital assistance on numerous occasions.