He reported that he became interested in birds at the age of seven , when his grandfather , Frank Rockingham Downing , showed him a song sparrow at a birdbath .
Gill was raised in Teaneck , New Jersey .
Gill reported that Gill became interested in birds at the age of seven , when Gill 's grandfather , Frank Rockingham Downing , showed him a song sparrow at a birdbath .
Gill was raised in Teaneck , New Jersey .