| Title | Edition | Year of Publication | Contributors | Country of Publication | Possible Copyright Status | Available Online? |
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| Adventures in green places | | 1926 | Herbert Ravenel Sass | |  | | |  |
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| Adventures in green places | | 1935 | Alice R. Huger (Alice Ravenel Huger) Smith, Herbert Ravenel Sass | | | |  | | 
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| The adventures of a grain of dust | | 1922 | Hallam Hawksworth | | | |  | |
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| The adventures of a nature guide | | 1920 | Enos Abijah Mills | | | | | |   
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| Adventures with a Texas naturalist | [1st ed.] | 1947 | Roy Bedichek | | | | | |
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| Afoot and afloat | | 1907 | Clifton Johnson, John Burroughs | | | | | |
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| Aide-mémoire d'histoire naturelle | | 1927 | Antoine Pizon |  | | | | |
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| An almanac for moderns | | 1935 | Donald Culross Peattie | | | | | |
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| Along nature's trails | | 1936 | Lillian Cox. Athey | | | | | |
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| The American natural history: a foundation of useful knowledge of the higher animals of North America | Fireside ed. ... | 1914 | Beard, William T. (William Temple) Hornaday | | | | | |
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| The Andes and the Amazon; or, Across the continent of South America. | | 1876 | James Orton | | | | | |
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| Animal life in field and garden | | 1921 | Jean-Henri Fabre, Florence Constable Bicknell | | | | | |
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| The anxious seat | | 1914 | Henry Abbott | | | | | |
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| Au soleil des saisons | | 1932 | Charles Silvestre | | | | | |
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| Aus der werkstatt der natur | | 1930 | Hermann Drechsler |  | | | | |
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| Autumn notes in Iowa | | 1914 | Selden Lincoln Whitcomb | | | | | |
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| Backyard exploration | | 1927 | Paul Griswold Howes | | | | | |
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| The beauties of nature and the wonders of the world we live in | | 1892 | Sir John Lubbock | | | | | |
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| Beyond the pasture bars | | 1914 | Dallas Lore Sharp, Bruce Horsfall | | | | | |
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| Billy, the boy naturalist: the true story of a naturalist's boyhood in Virginia just after the civil war | | 1918 | William A. Murrill | | | | | |
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| Bird islands of Peru: the record of a sojourn on the west coast | | 1925 | Robert Cushman Murphy | | | | | |
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| Birds and animals | | 1921 | Andrew L. Byers | | | | | |
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| Birds and bees | Rev. ed. | 1926 | John Burroughs | | | | | |
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| Birds in the wilderness | | 1936 | George Miksch Sutton | | | | | |
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| The black swans, and other friends indoors and out | | 1918 | Alvin Howard Sanders | | | | | |
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| The book of a naturalist | | 1919 | W. H. (William Henry) Hudson | | | | | |
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| The Book of popular science | | 1928 | | | | | | |
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| The Book of popular science | | 1929 | Dexter Simpson Kimball | | | | | |
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| The book of popular science | | 1959 | | | | | | |
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| The book of woodcraft | | 1912 | Ernest Thompson Seton | | | | | |
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| The book of woodcraft and Indian lore | | 1922 | Ernest Thompson Seton | | | | | |
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| The borderland of country life | | 1919 | Augusta Larned | | | | | |
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| Brasilianische tage und nächte | | 1931 | Waldemar Bonsels, Freiherr von Adolph Dungern | | | | | |
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| A century of progress in the natural sciences, 1853-1953 | | 1955 | | | | | | |
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| Charles Darwin and the Golden Rule | | 1954 | William Emerson Ritter, Edna Watson Bailey | | | | | |
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| Charles Kellogg: the nature singer, his book | | 1929 | Charles Kellogg | | | | | |
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| Chats with Uncle Jack about nature | | 1929 | Charles Wesley Naylor | | | | | |
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| A child's guide to living things | | 1912 | Edwin Tenney Brewster | | | | | |
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| Cold River | | 1921 | Henry Abbott | | | | | |
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| The common earth | | 1932 | E. L. Grant Watson, T. Sturge Moore | | | | | |
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| Concord river: selections from the journals of William Brewster | | 1937 | William Brewster, Frank Weston Benson, Smith Owen Dexter | | |  | | |
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| Country cousins | | 1927 | David Grayson, Charles Livingston Bull, Walter A. (Walter Alden) Dyer | | | | | |
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| The country rambler | | 1934 | Edmund W. Arthur | | | | | |
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| Country walks in many fields | | 1935 | Joseph Rydings | | | | | |
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| Country | | 1934 | H. J. (Harold John) Massingham | | | | | |
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| Cours abrégé d'histoire naturelle et d'hygiène | | 1922 | V. Boulet | | | | | |
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| A course of elementary instruction in practical biology | | 1883 | H. Newell (Henry Newell) Martin, Thomas Henry Huxley | | | | | |
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| Cross trails and chaparral | | 1925 | Eunice T. Gray | | | | | |
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| Curious habits of our common birds, animals, and plants | | 1935 | John Harvey Furbay, William D. Vennard | | | | | |
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| Dark trails: adventures of a naturalist | | 1930 | George Kruck Cherrie | | | | | |
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| Das antlitz Brasiliens: natur und kultur eines sonnenlandes | | 1927 | Konrad Guenther | | | | | |
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| Das grüne jahr, eine landschaftsdichtung: erlebnisse eines fischers und jägers | | 1932 | Otto Ehrhart | | | | | |
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| Das land der sehnsucht: reisen eines naturforschers im Südan | | 1925 | R. H. (Raoul Heinrich) Francé | | | | | |
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| Das Leben auf der Erde | | 1928 | Julius Schaxel | | | | | |
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| Dein, wald, herbst und winter | | 1933 | Paul Eipper, Hein Gorny | | | | | |
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| Der deutsche wald | | 1935 | | | | | | |
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| The desert; further studies in natural appearances | | 1930 | J. Smeaton Chase, Dix Van Dyke, John Charles Van Dyke | | | | | |
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| The desert: further studies in natural appearances | | 1918 | | | | | | |
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| Die heimliche fährte | | 1935 | Hans Lorenz Lenzen | | | | | |
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| Documentary material on nature protection and wild life preservation in Latin America: Prepared for the use of the Committee of experts on nature protection and wild life preservation, Pan American union, Washington, D.C., May 13-16, 1940 | | 1940 | | | | | | |
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| Down Goose creek | | 1931 | William Seeman, Watts Fowler | | | | | |
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| Dragon lizards of Komodo: an expedition to the lost world of the Dutch East Indies | | 1927 | W. Douglas (William Douglas) Burden | | | | | |
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| Early naturalists in the far West | | 1943 | Roland Herrick Alden, John Dempster Ifft | | | | | |
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| East and West: comparative studies in nature in eastern and western states | | 1911 | Stanton Davis Kirkham | | | | | |
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| Eskimo year: a naturalist's adventures in the far north | | 1934 | George Miksch Sutton | | | | | |
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| Everyday adventures | | 1920 | Samuel Scoville | | | | | |
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| Extinct Pennsylvania animals | | 1919 | Henry W. Shoemaker | | | | | |
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| The face of the fields | | 1911 | Dallas Lore Sharp | | | | | |
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| Fairy roads to Science-Town | | 1919 | Mary Earle Hardy, Mrs. A. S. Hardy, Helen M. Barton | | | | | |
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| The fairyland around us | | 1918 | Opal Stanley Whiteley | | | | | |
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| The fall of the year | | 1911 | Dallas Lore Sharp, Robert Bruce Horsfall | | | | | |
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| Field and study | | 1919 | John Burroughs | | | | | |
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| Field, forest and farm: things interesting to young nature-lovers, including some matters of moment to gardeners and fruit-growers | | 1919 | Jean-Henri Fabre, Florence Constable Bicknell | | | | | |
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| field-farings | | 1892 | Martha McCulloch-Williams, approximately Martha McCulloch-Williams | | | | | |
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| Filmjagd auf kolibris und faultiere | | 1929 | Artur Heye | | | | | |
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| Florida trails as seen from Jacksonville to Key West and from November to April inclusive | | 1910 | Winthrop Packard | | | | | |
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| Forêt voisine | | 1933 | Maurice Genevoix | | | | | |
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| Four walls in the open | | 1929 | Edward Coppée Thurston | | | | | |
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| The fraternity of the fields | | 1914 | Elmer Willis Serl | | | | | |
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| Gardening and out-of doors | | 1917 | Philip Columbus Croll | | | | | |
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| Glories of the Carolina coast | | 1925 | James Henry Rice | | | | | |
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| Glories of the Carolina coast | | 1936 | James Henry Rice | | | | | |
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| God's beautiful out-of-doors | | 1916 | Mary Craig Sammis | | | | | |
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| The golden forest | | 1930 | Edith Howes, M. Lee Thompson |  | | | | |
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| The gospel of out of doors | | 1920 | Francis E. (Francis Edward) Clark | | | | | |
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| Green trails and upland pastures | | 1917 | Walter Prichard Eaton | | | | | |
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| The growth of biology: zoology from Aristotle to Cuvier, botany from Theophrastus to Hofmeister, physiology from Harvey to Claude Bernard | | 1925 | William A. (William Albert) Locy | | | | | |
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| The harvest of a quiet eye: a book of digressions | | 1927 | Beatrice Stevens, Odell Shepard | | | | | |
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| Health and education | | 1874 | Charles Kingsley | | | | | |
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| Here and there in popular science | | 1926 | Percy Favor Bicknell, Jean-Henri Fabre | | | | | |
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| A hind in Richmond park | | 1922 | W. H. (William Henry) Hudson | | | | | |
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| Historia natural | | 1932 | Ignacio Puig |  | | | | |
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| History of the Willamette valley, Oregon | | 1927 | Robert Carlton Clark | | | | | |
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| Holiday meadow | | 1930 | Edith M. (Edith Marion) Patch | | | | | |
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| Holiday Pond | | 1929 | Edith M. (Edith Marion) Patch, Wilfrid S. Bronson | | | |  | |
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| The how and why of life | | 1932 | Michael Smith, Katharine Burton, Emma Wheat Hastings Gillmore | | | | | |
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| How life begins: the story of how nature conceives and bears her children | | 1935 | George L. Bird | | | | | |
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| How to hunt with the camera: a complete guide to all forms of outdoor photography | | 1926 | William Nesbit | | | | | |
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| Hunting trails on three continents: a book of the Boone and Crockett club | | 1933 | George Bird Grinnell, Kermit Roosevelt, Prentiss Nathaniel Gray | | | | | |
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| I visit the antipodes | | 1937 | Cherry Kearton | | | | | |
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| Im jagdrevier; heimatliche natur- und jagdbilder | | 1920 | Wilhelm Hochgreve | | | | | |
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| In Berkshire fields | | 1920 | Walter Prichard Eaton, Walter King Stone | | | | | |
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| In Berkshire fields | | 1926 | Walter Prichard Eaton | | | | | |
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| In the beauty of meadow and mountain | | 1913 | Charles Coke. Woods | | | | | |
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| In the Catskills: selections from the writings of John Burroughs | | 1910 | Clifton Johnson, John Burroughs | | | | | |
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| In the open: intimate studies and appreciations of nature | | 1908 | Stanton Davis Kirkham | | | | | |
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| In the wilds of South America: six years of exploration in Columbia, Venezuela, British Guiana, Peru, Bolivia, Argentina, Paraguay, and Brazil | | 1918 | Leo E. (Leo Edward) Miller | | | | | |
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| In wald und flur: a German reader for high schools and colleges | | 1927 | Franklin James Holzwarth, Hugo Polt | | | | | |
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| In winter quarters, from Dumbiedykes to town and back again | | 1920 | Alvin Howard Sanders | | | | | |
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| Interesting neighbors | | 1922 | Oliver Peebles Jenkins, W. S. Atkinson | | | | | |
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| Jen sheng: the root of life | | 1936 | Philip Gibbons, Mikhail Mikhaĭlovich Prishvin, Julian S. Huxley | | | | | |
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| Jen Sheng: the root of life | | 1936 | Philip Gibbons, George Walton, Mikhail Mikhaĭlovich Prishvin | | | | | |
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| The Jonathan papers | | 1912 | Elisabeth Woodbridge Morris | | | | | |
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| Journey into summer: a naturalist's record of a 19,000-mile journey through the North American summer | | 1960 | Edwin Way Teale | | | | | |
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| Junglemania | | 1933 | Arthur Torrance | | | | | |
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| Junglemania: exploring the jungles for science | | 1933 | Arthur Torrance | | | | | |
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| La féerie des bois | | 1927 | Henry Surchamp | | | | | |
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| La mystique de la ferme | | 1933 | | | | | | |
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| La science de l'oncle Paul: entretiens familiers sur les animaux, les plantes, les minéraux, le ciel, la terre, l'industrie | | 1926 | Jean-Henri Fabre | | | | | |
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| La vie en action | | 1918 | Edmond Perrier | | | | | |
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| Labrador, the country and the people | New ed., with additional chapters. | 1913 | Sir Wilfred Thomason Grenfell | | | | | |
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| Leaves from nature's story-book ... | | 1893 | Meriba Ada Babcock Kelly | | | | | |
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| Lessons in nature | | 1915 | William Horace Williams | | | | | |
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| Life in an air castle: nature studies in the tropics | | 1938 | Francis Lee Jaques, Frank M. (Frank Michler) Chapman | | | | | |
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| The linhay on the downs, and other adventures in the old and the new world | | 1935 | Henry Williamson | | | | | |
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| Literary pilgrimages of a naturalist | | 1911 | Winthrop Packard | | | | | |
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| Little folks tramping and camping: a nature-study story of real children and a real camp | | 1920 | Harold James Cue, Anna Blunt Morgan | | | | | |
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| Little tales of common things: for the home and school | | 1918 | Inez N. (Inez Nellie Canfield) McFee | | | | | |
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| Living things around us | | 1928 | Roy H. (Roy Hilman) Thomas | | | | | |
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| The living world | | 1937 | Samuel Howard Williams | | | | | |
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| The living year | | 1950 | Anne Marie Jauss, Richard Headstrom | | | | | |
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| The lone swallows and other essays of the country green | | 1926 | Henry Williamson | | | | | |
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| Mémoires de la Société des sciences naturelles & historiques, des lettres et des beaux-arts de Cannes et de l'arrondissement de Grasse | | 1928 | | | | | | |
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| Mark Catesby: the colonial Audubon | | 1961 | George Frederick Frick, Raymond Phineas Stearns | | | | | |
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| The meadows: familiar studies of the commonplace | | 1926 | John Charles Van Dyke | | | | | |
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| Measuring the effectiveness of sound pictures as teaching aids | | 1933 | Varney Clyde Arnspiger | | | | | |
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| Meet the Southwest deserts | | 1960 | Philip Welles | | | | | |
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| Min Rejsedagbog: Skildringer fra den første Thule-Ekspedition | | 1915 | Kund Johan Victor Rasmussen |  | | | | |
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| Minstrel weather | | 1920 | Marian Storm | | | | | |
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| More About Wild Nature | | 1893 | Mrs. (Eliza Elder) Brightwen | | | | | |
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| Mother Nature and her fairies | | 1913 | Marv Allen, Hugh Findlay, Frances | | | | | |
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| Mother nature series | | 1928 | Fannie Wyche Dunn, Marie O'Hara, Eleanor Troxell | | | | | |
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| The mountain trail and its message | | 1911 | Albert W. (Albert Wentworth) Palmer | | | | | |
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| The mountains and other nature sketches | | 1920 | Olin Alfred Curtis | | | | | |
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| Muskrat City | | 1922 | Henry Abbott | | | | | |
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| My studio neighbors | | 1898 | W. Hamilton (William Hamilton) Gibson | | | | | |
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| Natural history | | 1963 | Richard A. Pimentel | | | | | |
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| Natural history as shown on postage stamps | | 1916 | James H. Lyons | | | | | |
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| The natural history of a Wasatch autumn | | 1958 | Claude Teancum Barnes | | | | | |
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| The natural history of a yard | | 1955 | Leonard Dubkin | | | | | |
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| Natural history of Hawaii: being an account of the Hawaiian people, the geology and geography of the islands, and the native and introduced plants and animals of the group | | 1915 | William Alanson Bryan | | | | | |
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| The natural history of the farm: a guide to the practical study of the sources of our living in wild nature | | 1913 | James G. (James George) Needham | | | | | |
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| Natural history studies: an anthology from the author's own works | | 1921 | J. Arthur (John Arthur) Thomson | | | | | |
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| The Naturalist as interpreter and seer | | 1902 | | | | | | |
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| A Naturalist in Western China with Vasculum, Camera, and Gun: Being Some Account of Eleven Years' Travel, Exploration, and Observation in the More Remote Parts of the Flowery Kingdom | | 1913 | Ernest Henry Wilson | | | | | |
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| Naturalist's guide to the Americas | | 1926 | Victor E. (Victor Ernest) Shelford | | | | | |
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| Naturalists of the frontier | [2d ed., rev. and enl.] | 1948 | Samuel Wood Geiser | | | | | |
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| Naturbuch für die jugend | | 1931 | Walter de Haas |  | | | | |
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| The nature almanac: a handbook of nature education | | 1927 | Arthur Newton Pack, E. Laurence (Ephraim Laurence) Palmer | | | | | |
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| Nature and outdoor life | | 1927 | | | | | | |
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| Nature chats: a year out-of-doors | | 1934 | John Harvey Furbay, William D. Yennard | | | | | |
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| Nature cruisings to the old home town and the Little Hill farm | | 1928 | John Van Schaick | | | | | |
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| Nature facts | | 1926 | Margaret J. Stevenson | | | | | |
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| Nature facts | | 1995 | Margaret J. Stevenson | | | | | |
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| The nature hour | | 1935 | Samuel M. Levenson, Teressa Kahn, Lucille Nicol | | | | | |
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| Nature notes at Netop: the cabin in the woods | | 1918 | William Elmer Towne | | | | | |
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| Nature notes of the Pikes Peak region | | 1916 | Lloyd Shaw | | | | | |
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| Nature's program | | 1926 | Gaylord Johnson | | | | | |
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| Nature's year | | 1932 | Mrs. Cora (Gillingham) Sheafor | | | | | |
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| Nature science | | 1934 | Marion L. Langham, Clyde Fisher | | | | | |
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| Nature sketches | | 1925 | Johan August Udden | | | | | |
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| Nature stories | | 1912 | Mary. Gardner, Ethel Blossom, Helen Babbitt | | | | | |
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| Nature stories for children ... | | 1927 | Nora B. Albright, Jennie Hall | | | | | |
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| Nature stories for children: an autumn book | | 1926 | Jennie Hall, Eva L. (Eva Lucretia) Gordon | | | | | |
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| Nature stories for children: fifty five-minutes talks | | 1927 | William Samuel Herbert Wylie, Amos R. Wells | | | | | |
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| Nature story hours: a silent reader | | 1928 | Mabel Betsy Hill, Fannie Westfall Brown, Eveline A. Waterbury | | | | | |
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| Nature studies in field and wood | | 1911 | Chester A. (Chester Albert) Reed | | | | | |
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| Nature study in elementary schools. A manual for teachers | | 1897 | Lucy Langdon Williams Wilson | | | | | |
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| Nature trails | | 1927 | D. (Dietrich) Lange | | | | | |
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| Nature--by seaside and wayside: a series in natural science | | 1936 | Mary Geisler Phillips, Julia McNair Wright | | | | | |
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| New England fancies | | 1935 | Walter Elmer Ekblaw | | | | | |
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| New England vista | | 1930 | Walter Prichard Eaton, Walter King Stone | | | | | |
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| New green world | | 1954 | Josephine Herbst | | | | | |
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| New walks in old ways: in which relationship with certain humble folk of the roadside and the fields is re-established | | 1921 | Alvin Howard Sanders | | | | | |
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| New-England's rarities discovered in birds, beasts, fishes, serpents, and plants of that country. | | 1865 | fl. John Josselyn, Edward Tuckerman | | | | | |
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| Next to the ground: chronicles of a countryside | | 1902 | Martha McCulloch Williams, approximately Martha McCulloch-Williams | | | | | |
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| Nociones de historia natural por el Dr: Otto Schmeil, segundo grado escolar | | 1926 | O. (Otto) Schmeil, Ernst Haack, Ernst Holzfusz | | | | | |
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| Nociones de historia natural según el método del Dr: Otto Schmeil, primer grado escolar | | 1926 | O. (Otto) Schmeil, Ernst Holzfusz, Paul Putzar | | | | | |
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| North and South: notes on the natural history of a summer camp and a winter home | | 1913 | Stanton Davis Kirkham | | | | | |
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| Notes From Nature's Garden | | 1906 | Frances Anne Bardswell | | | | | |
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| October farm: from the Concord journals and diaries of William Brewster | | 1936 | Daniel Chester French, William Brewster | | | | | |
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| The old house at Coate: and other hitherto unpublished essays | | 1948 | Samuel J. (Samuel Joseph) Looker, Richard Jefferies | | | | | |
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| Old Plymouth trails | | 1920 | Winthrop Packard | | | | | |
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| On the wings of a bird | | 1929 | Herman Palmer, Herbert Ravenel Sass | | | | | |
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| On Yankee hilltops | | 1933 | Walter Prichard Eaton | | | | | |
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| Orchard and meadow | | 1919 | Clara E. Atwood, Zoe. Meyer | | | | | |
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| Our Country Home: How We Transformed a Wisconsin Woodland | | 1908 | Frances Kinsley Hutchinson | | | | | |
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| Our country home: how we transformed a Wisconsin woodland | | 1907 | Frances Kinsley Hutchinson | | | | | |
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| Our country life | | 1912 | Frances Kinsley Hutchinson | | | | | |
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| Our wonderful world | | 1935 | Frances Jenkins Olcott | | | | | |
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| Out in the open: extracts from Ruskin | | 1908 | Ruth Merriam Lawton, John Ruskin | | | | | |
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| Out of doors: a guide to nature | | 1932 | Paul B. (Paul Blakeslee) Mann, George Tracy Hastings | | | | | |
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| Out of doors: a guide to nature | | 1937 | Paul B. (Paul Blakeslee) Mann, George Tracy Hastings | | | | | |
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| Outdoor adventures | | 1928 | Albert E. Shirling | | | | | |
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| Outdoor adventures | | 1951 | Hal H. Harrison | | | | | |
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| Outdoor philosophy: the meditations of a naturalist | | 1912 | Stanton Davis Kirkham | | | | | |
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| Outdoors in the Cumberlands | | 1933 | Robert Sparks Walker | | | | | |
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| Pappa Kroknäbbs resa från Skåne till Lappland | | 1934 | Stig Wesslén |  | | | | |
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| Paradise north: an Alaskan year | | 1956 | Henry D. Barrow | | | | | |
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| The passions of the wild | | 1936 | William Robinson Calvert | | | | | |
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| Peace in the heart | | 1930 | Archibald Rutledge | | | | | |
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| Pheasant jungles | | 1927 | William Beebe | | | | | |
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| Phudd hill | | 1937 | Alan Devoe | | | | | |
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| Pilgrims of the wild | | 1935 | Grey Owl | | | | | |
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| Pioneering at Rowan-wood | | 1927 | Henry Abbott | | | | | |
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| Plantation game trails | | 1921 | Archibald Rutledge | | | | | |
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| The pond book | | 1936 | Walter P. Porter, Einar August Hansen, Ottilie Fov. | | | | | |
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| Prangender Sommer im deutschen Wald | | 1933 | Paul Eipper, Hein Gorny | | | | | |
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| The Pueblo Indian world: studies on the natural history of the Rio Grande valley in relation to Pueblo Indian culture | | 1945 | Bertha P. (Bertha Pauline) Dutton, John Peabody Harrington, Edgar L. (Edgar Lee) Hewett | | | | | |
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| Pussy letters | | 1929 | Kate Elenor Wilder | | | | | |
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| Pussy letters; "how" and "why" stories that will inspire a love for nature and the great out-of-doors | | 1927 | Kate Elenor Wilder | | | | | |
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| Quiet Hours With Nature | | 1904 | Mrs. (Eliza Elder) Brightwen, Theobald Carreras | | | | | |
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| The rainbow book of nature | [1st ed.]. | 1957 | Donald Culross Peattie | | | | | |
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| Raquette river | | 1931 | Henry Abbott, Henr | | | | | |
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| The road to Dumbiedykes: some rambling thoughts of one who found it | | 1916 | Alvin Howard Sanders | | | | | |
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| The Rocky Mountain wonderland | | 1915 | Enos Abijah Mills | | | | | |
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| The romance of everifarm | | 1922 | Harvey J. Sconce | | | | | |
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| The romance of Labrador | | 1934 | Sir Wilfred Thomason Grenfell | | | | | |
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| Runaway days | | 1927 | Samuel Scoville | | | | | |
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| Rustic sounds and other studies in literature and natural history | | 1917 | Sir Francis Darwin | | | | | |
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| Sanctuary letters: being a collection of nature writings | | 1933 | Sam. Campbell | | | | | |
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| Sanctuary! sanctuary! | | 1926 | Dallas Lore Sharp | | | | | |
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| Sand dunes and salt marshes | | 1925 | Charles Wendell Townsend, Ealph Hoffmann | | | | | |
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| Sand dunes and salt marshes | | 1913 | Charles Wendell Townsend | | | | | |
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| Savage Abyssinia | | 1927 | James E. (James Edwin) Baum | | | | | |
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| The secret of the wild | | 1927 | William Robinson Calvert | | | | | |
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| Secrets of the friendly woods | | 1926 | Rex Brasher | | | | | |
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| Seeing nature first | | 1913 | W. I. Beecroft, Clarence Moores Weed | | | | | |
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| A series of ten radio talks on Spring: the naturalist afield | | 1927 | Samuel Howard Williams, O. E. (Otto Emery) Jennings | | | | | |
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| Sharp eyes and other papers | | 1926 | John Burroughs | | | | | |
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| Skyo | | 1949 | Martha Hardy | | | | | |
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| Some spring days in Iowa | | 1908 | Frederick John Lazell | | | | | |
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| Some winter days in Iowa | | 1907 | Frederick John Lazell | | | | | |
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| A source book of biological nature-study | | 1919 | Elliot Rowland Downing | | | | | |
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| South America as I saw it: the observations of a naturalist on the living conditions of its common people; its topography and products; its animals and plants | | 1934 | W. S. (Willis Stanley) Blatchley | | | | | |
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| The spell of the Rockies | | 1911 | Enos Abijah Mills | | | | | |
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| The spring of the year | | 1912 | Dallas Lore Sharp, Robert Bruce Horsfall | | | | | |
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| Sterbende Welt | | 1927 | A. Reischek | | | | | |
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| The stir of nature: a book for young American naturalists | | 1930 | William H. (William Henry) Carr, Clyde Fisher, Thomas W. Voter | | | | | |
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| Stories by seasons | | 1930 | R. Bruce Horsfall, Helen, Helen von Kolnitz Hyer | | | | | |
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Public Domain Books