My main research has been at the interface between the field and the laboratory to examine physiological and behavioral adaptation to the physical environment. This work led to energetics of bees and their colony economy. I then worked on the social organization of ravens with a view to understanding how and why unrelated individuals share and/or defend food bonanzas. More recently, after solving that problem, I've concentrated on exploring cognition.
Since retiring in 2004, I've written 5 books, "The Snoring Bird", "The Summer World", "Nesting Season: Cuckoos, Cuckolds and the Evolution of Monogamy", "Life Everlasting: The Animal Way of Death", and "The Homing Instinct: Meaning, Mystery in Animal Migration": My next book, to be published in Spring 2016 is "One Wild Bird at a Time".
My research since retiring from UVM has included eight single-authored published articles with three more in press and nine co-authored published articles. My material for the recent research articles, which has instigated the books, has come from being based at my off the grid cabin in western Maine where I am pursuing field work.