Bill is known in the birding community as a leading digital photographer. Since 2001 he has built a collection of photos documenting over 650 species of North American birds. His photography has appeared in international nature publications, books, newspapers, interpretive signs, web pages, advertisements, corporate logos, and as references for art works. Also a published writer, Bill wrote a chapter for Good Birders Don't Wear White, is a past Colorado/Wyoming regional editor for North American Birds and is proud to be on the Leica Birding Team. Bill is especially fond of his involvement with the ABA's Institute for Field Ornithology and Young Birder Programs. Bill is a popular birding guide, speaker, and workshop instructor, and teaches middle school science in Boulder, Colorado. When he isn’t birding he enjoys family time with his wife, son and labradoodle.

Bill studied geology at Colorado State University, earned a BS in earth science education at the University of Northern Colorado and an MA in secondary science education at the University of Colorado Boulder.