Kevin Zobrist may be the only person in the world to embark on what he affectionately calls "tree safaris," using his camera to hunt down western Washington's 32 native species. He has already spent seven years documenting each variety, and the chase continues as he pursues ever better photographs. Zobrist grew up surrounded by the beautiful beaches and dense woodlands of the Pacific Northwest, earning B.S. and M.S. degrees in forestry, both from the University of Washington. Today, he is an associate professor at Washington State University, overseeing the Extension Forestry program in Snohom...