About the Authors

Scott Wilson

ScottD.Wilson@ec.gc.ca

Affiliation Environment Canada, Canadian Wildlife Service, Saskatoon, Saskatchewan, Canada

Eric M. Anderson

Affiliation Centre for Wildlife Ecology, Simon Fraser University, Burnaby, British Columbia, Canada

Amy S. G. Wilson

Affiliation Department of Forest Sciences, University of British Columbia, Vancouver, British Columbia, Canada

Douglas F. Bertram

Affiliation Environment Canada, Science and Technology Branch, c/o Institute of Ocean Sciences, Sidney, Canada

Peter Arcese

Affiliation Department of Forest Sciences, University of British Columbia, Vancouver, British Columbia, Canada

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SW EMA ASGW DFB PA. Analyzed the data: SW. Wrote the paper: SW EMA ASGW DFB PA. Compiled Christmas Bird Count Data: SW.