Acknowledgements
This work was supported by ARCS Foundation of Illinois, American
Ornithological Society, the Women’s Board of The Field Museum, James
Bond Fund, and National Geographic (#WW231R-17). USFWS MI Ecological
Services Field Office supported tower construction in Michigan. We thank
USFWS, USFS, USDA Wildlife Services, and MI DNR for hosting towers and
A. Makarewicz and the Davies and Sansote families for providing field
housing in Michigan. We also thank Josie, M. Seymour, and F. Wolff for
hosting towers and M. Tukeva and the Campaignes for providing field
housing on Cat Island. Finally, we thank N. Gottel, C. Moreau, T. Price,
M. Ramalho, J. Novembre, B. Trevelline, E. Videvall, and B. Weigel for
advice on this study as well as the many field technicians who helped
collect samples.