- Hawks in flight, the flight identification of North American raptors, Pete Dunne, David Allen Sibley, and Clay Sutton
- Illustrated genera of imperfect fungi,, by H.L. Barnett and Barry B. Hunter
- Common spiders of North America, Richard A. Bradley ; illustrations by Steve Buchanan ; sponsored by the American Arachnological Society
- A field guide to the mammals, field marks of all North American species found north of Mexico, text and maps by William Henry Burt ; ill. by Richard Philip Grossenheider ; sponsored by the National Audubon Society and National Wildlife Federation
- Trees of the central hardwood forests of North America, an identification and cultivation guide, Donald J. Leopold, William C. McComb, Robert N. Muller
- Mushrooms of the world., With 186 color plates by Laura Maggiora. Translated by Ronald Strom
- How to know the insects,, an illustrated key to the more common families of insects, with suggestions for collecting, mounting and studying them
- How to know the lichens, [by] Mason E. Hale
- A field guide to the insects of America north of Mexico, by Donald J. Borror and Richard E. White ; color and shaded drawings by Richard E. White ; line drawings by the authors
- How to know the minerals and rocks
- How to know the seaweeds, an illustrated manual for identifying the more common marine algae of both our Atlantic and Pacific coasts with numerous aids for their study, by E. Yale Dawson
- A field guide to western birds, a completely new guide to field marks of all species found in North America west of the 100th meridian and north of Mexico, text and illustrations by Roger Tory Peterson ; maps by Virginia Marie Peterson
- How to know the grasses;, pictured-keys for determining the common and important American grasses, with suggestions and aids for their study
- A field guide to shells of the Pacific Coast and Hawaii, by Percy A. Morris
- Eastern birds, John Farrand, Jr
- Seed identification manual, [by] Alexander C. Martin and William D. Barkley
- Tracks and trailcraft
- Mushrooms & other fungi of North America, by Roger Phillips, assisted by Geoffrey Kibby & Nicky Foy with editing help from Alick Henrici [and others]
- A complete field guide to nests in the United States,, including those of birds, mammals, insects, fishes, reptiles, and amphibians,, by Richard Headstrom
- Wild food plants of Indiana and adjacent states, Alan McPherson and Sue McPherson ; drawings by John Brooks
- Wild flowers of Ohio and adjacent States,, by Isabelle H. Klein. Original illus. by Ruth C. Mayer, rev. for this ed. by Mary Thomas
- The common insects of North America, by Lester A. Swan and Charles S. Papp ; foreword by Evert I. Schlinger. Illus. by Charles S. Papp
- Forest trees of Illinois, by Robert H. Mohlenbrock ; photography by John A. Richardson and Robert H. Mohlenbrock ; illustrations by Miriam Wysong Meyer and Fredda J. Burton
- About life, concepts in modern biology, by Paul S. Agutter and Denys N. Wheatley
- Family matters, secrecy and disclosure in the history of adoption, E. Wayne Carp
- Hopi kachina dolls, with a key to their identification, by Harold S. Colton ; color photographs by Jack Breed
- Mushrooms of North America, [by] Orson K. Miller, Jr
- Vertebrates of the United States, W. Frank Blair [and others]
- How to know pollen and spores, [by] Ronald O. Kapp
- The bees in your backyard, a guide to North America's bees, Joseph S. Wilson & Olivia Messinger Carril
- The National Audubon Society field guide to North American birds, John Bull and John Farrand, Jr. ; revised by John Farrand ; visual Key by Amanda Wilson and Lori Hogan
- Wood, identification & use, Terry Porter
- The complete book of mushrooms, over 1,000 species and varieties of American, European, and Asiatic mushrooms, Augusto Rinaldi, Vassili Tyndalo ; translated from the Italian by Italia and Alberto Mancinelli ; [color ill. by Laura Rosano Maggiora] With 460 ill. in black and white and in color
- A field guide to Pacific Coast fishes of North America, from the Gulf of Alaska to Baja, California, William N. Eschmeyer, Earl S. Herald ; illustrations by Howard Hammann, Katherine P. Smith, associate illustrator
- The shrub identification book;, the visual method for the practical identification of shrubs, including woody vines and ground covers., Photos. by A.W. Merwin
- Our northern shrubs and how to identify them., With a new appendix of nomenclatural changes by Edward G. Voss
- Field book of American wild flowers., Completely rev. and enl. by Norman Taylor
- Trees of the northern United States and Canada, John Laird Farrar
- A field guide to whales, porpoises, and seals from Cape Cod to Newfoundland, Steven K. Katona, Valerie Rough, and David T. Richardson
- Stokes field guide to birds, Donald and Lillian Q. Stokes
- The new field book of American wild flowers, Harold William Rickett
- How to know the ferns, a guide to the names, haunts, and habits of our common ferns, by Francis Theodora Parsons ; illustrated by Marion Satterlee and Alice Josephine Smith
- The Sibley guide to birds, written and illustrated by David Allen Sibley
- National Audubon Society field guide to North American mushrooms, Gary H. Lincoff ; visual key by Carol Nehring
- Mammals of North America, Nora Bowers, Rick Bowers, and Kenn Kaufmann
- A pocket guide to sharks of the world, illustrated by Marc Dando ; text by David A. Ebert and Sarah Fowler
- Insects that feed on trees and shrubs, by Warren T. Johnson and Howard H. Lyon ; contributing authors, C.S. Koehler, J.A. Weidhaas
- Flora of Missouri
- The National Audubon Society field guide to North American seashore creatures, Norman A. Meinkoth
- A guide to the identification of the genera of bacteria,, with methods and digests of generic characteristics,, by V.B.D. Skerman