John James Audubon (1868). “The Life and Adventures of J. J. Audubon ... Edited, from Materials Supplied by His Widow, by Robert Buchanan. Second Edition. [With Portraits.]”, p.91
Henry Walter Bates (1873). “The Naturalist on the River Amazons: A Record of Adventures, Habits of Animals, Sketches of Brazilian and Indian Life, and Aspects of Nature Under the Equator, During Eleven Years of Travel”, p.129