A professor in the Department of Ecology and Evolutionary Biology, I first came to Cornell in 1985 as a lecturer after obtaining my Ph.D. in 1983 at U. C. Berkeley while working with Frank Pitelka. In 1984, I was a Thord-Gray and Fulbright Fellow at the University of Gothenburg Sweden with Malte Andersson and in 1985 I attended Oxford University in England as a NATO Postdoctoral Fellow with John Krebs. From 1986-1988, I was a National Science Foundation Postdoctoral Fellow in environmental biology with Paul Sherman. In 1988, I joined the tenure-track Cornell faculty in Ecology and Systematics, later renamed the Department of Ecology and Evolutionary Biology. I am a fellow of the American Ornithologists' Union, a member of the administrative board of the Cornell Laboratory of Ornithology, and chair of Cornell's Institutional Care and Animal Use Committee. Twice chosen as a "Most Influential Faculty Member" by Merrill Presidential Scholars, I received my college's Faculty Excellence in Mentoring Award in 2002, and was selected as a Stephen H. Weiss Presidential Fellow for my teaching in 2007.