He has been an avid birder since the early 1970s, starting with Lyman Langdon Audubon Society (Nassau County, NY) and continuing with Tropical Audubon after his family relocated to Miami in 1977. In addition to leading local trips for TAS, he has been a co-leader with Brian Rapoza on out-of-state TAS trips, and has led trips during local ABA Conventions. Bill is also Count Compiler for the Kendall Christmas Bird Count.