Frank B. Gill Frank B. Gill is an American ornithologist with worldwide research interests and birding experience. From 1969-1995, Gill was a full-time staff member of the Academy of Natural Sciences in Philadelphia where he held various positions, including Chairman for the Department of Ornithology and Vice President for Systematics and Evolutionary Biology. More recently, Gill was the president of the American Ornithologists' Union from 1998-2000, receiving the Union’s highest honor, the William Brewster Award. Gill is an elected member of the International Ornithological Congress. From 1996=2004,, Gill was Senior Vice President and Director of Science for the National Audubon Society. In 2007, he was elected to the Board of Directors of the National Audubon Society, where he had been a senior ornithologist.