Acknowledgements
We gratefully acknowledge the assistance and marsh access provided to us by the staff of Point Pelee National Park and Steve Zeidler of Matchedash Camp, as well as Ministry of Natural Resources and Forestry Midhurst District office staff. We thank the following individuals for their technical support, advice and tireless efforts in the field in search of muskrat houses: M. Allan, L. Brown, M. Brown, T. DeGazio, T. Dobbie, J. Greenhorn, S. Hagey, G. Meadows, S. Morin, S. Newar, H. Sawada, L. Scott, B. Stevenson and K. Wisniewski. Financial support for this study was provided by the Ontario Ministry of Natural Resources and Forestry; in-kind support was provided by Parks Canada (Point Pelee National Park).