Is it farther or further?
with reference to birds or pictures of them, from U.S. naturalist John James Audubon (1785-1851).
American ornithologist and artist. His effort to catalog every species of bird in the United States resulted in the publication of The Birds of America (1827-1838), a collection of 1,065 life-size engravings of birds found in eastern North America. It is considered a classic work in ornithology and in American art.