The Natural History of Selborne in the County of Southampton by Gilbert White. Oxford University Press, 1977. Originally published in 1789. paper ed. 1977 printing location other editions location 1 location 2 location 3 location 4 location 5

Born Free, a lioness of two worlds by Joy Adamson. Pantheon Books, 1960 location 

A Sand County Almanac and Sketches Here and There by Aldo Leopold. Oxford University Press, 1949 2001 paper ed. location other editions location 1 location 2 location 3 location 4 

Nature by Ralph Waldo Emerson. Originally published in 1836 in an edition of 500 copies. location 1 location 2 location 3 

Walden by Henry David Thoreau. Originally published in 1854 (2000 copies). paper copies various eds. location 

Guide to the Study of Fishes by David Starr Jordan. Henry Holt and Co., 1905 2 volumes location  The author later became president of Stanford University.

Journal of Researches into the Geology and Natural History of the Various Countries Visited by HMS Beagle Under the Command of Captain Fitzroy, RN from 1832 to 1836 by Charles Darwin. Originally published in 1839. Darwin's description of the visit to Patagonia, Tierra del Fuego, Chile, Peru, and islands in the Pacific. paper ed. location 1 location 2 1st edition online, Complete Works of Charles Darwin Online, from University of Cambridge.

Field Guide to the Birds by Roger Tory Peterson. Houghton Mifflin, 1934 paper ed. location  2002 paper ed. location  Peterson's Field Guide to the Birds, in 1934, turned out to be a landmark field guide and an anniversary edition reprint was later published. 

In the Shadow of Man by Jane Goodall. Houghton Mifflin, 1971 location 

Cambridge Natural History, edited by SF Harmer and AE Shipley. Macmillan, 1895-1909. 10 volumes location 

Contributions to the Natural History of the United States of America by Louis Agassiz. Little, Brown and Company, 1857-1862. 4 volumes were completed. location 

Bulletin of the United States National Museum 1 (1875) - 298 (1971). Volumes hold articles pertaining to the collections of the Museum, as part of the Smithsonian Institution. Readers will find memorable contributors within these volumes, including Edward D. Cope, Elliott Coues, David Starr Jordan, William Healey Dall, Joseph Harvey Riley, and Richard E. Blackwelder. 1875-1905 location 1907-1971 location  

Zoology of New York, or New-York Fauna: comprising detailed descriptions of all the animals hitherto observed within the state of New York with brief notices of those found occasionally near its borders, and accompanied by appropriate illustrations by James E. DeKay. Carroll and Cook, 1842-1844. 1844 paper ed. location 1842-1844 paper ed. location