Wild Fowl Island is a small artificial pond in "The Lake" in Oakwood Cemetery. Reached by a short bridge, it had in the past been home to a rustic shelter that can be seen on old postcards.
Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "Lansingburgh, [Map bounded by Diamond St., Cemetery Ave., Thomas St., Hudson River]" The New York Public Library Digital Collections. 1872. http://digitalcollections.nypl.org/items/a7cf3afc-9dea-1913-e040-e00a1806525a