He is the lead author for Identify Yourself: The 50 Most Common Birding Identification Challenges published by Houghton Mifflin (2005).
He was the editor of All Things Reconsidered: My Birding Adventures by Roger Tory Peterson (Houghton Mifflin, 2006).
His most recent book is "The New Birder's Guide to Birds of North America" (2014, Houghton Mifflin Company).
He was an avid birder and musician and traveled widely performing, speaking, leading field trips, and consulting on ecotourism for birding festivals and nature events around the world.
[1][2] In 2009 he was nominated for a "Heart of Green" award by thedailygreen.com for his work in fighting Nature Deficit Disorder by helping introduce kids to bird watching.