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Acknowledgments
Studies of MC were supported by the University of Scranton Faculty Research Committee and by grants from the Howard Hughes Medical Institute to numerous research assistants. MC also thanks Anna Bushko for permission to use her property as a study site. Studies of DEB were supported by the USDA Forest Service North Central Forest Experiment Station through the assistance of F. Thompson III; thanks to J. Faaborg for advisement and numerous field assistants for data collection. C. Thompson provided input on molts and plumages.
Carey, Michael, M. Carey, D. E. Burhans and D. A. Nelson. 2008. Field Sparrow (Spizella pusilla), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/103
