Denning Behavior of Non-Gravid Wolves

Acknowledgments

These projects were supported by the U. S. Fish and Wildlife Service, U. S. National Biological Service, the U. S. D. A. North Central Forest Experiment Station, the U. S. National Park Service, and the International Wolf Center. For the Ellesmere work, the logistical support of the Polar Continental Shelf Project, Atmospheric Environment Services, and High Arctic International are also greatly appreciated. The help of several field assistants and of International Wolf Center observers is also gratefully acknowledged. C. S. Asa and T. J. Meier suggested improvements to the manuscript.

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