1981- in 2 v.: v.1, Subject index; v.2, Title index, Publisher/title index, Association name index, Acronym index, Key to publishers' and distributors' abbreviations.

In Watching Nature, naturalist Mark Garland takes readers on field trips among the plants and animals of the cool highlands of West Virginia, the forested ridges and valleys of western Maryland and central Pennsylvania, the gently rolling Piedmont region around Washington, D.C., and the flat coastal plain extending from southern New Jersey to Virginia Beach. Anecdotes from the author's own adventures - the nocturnal sighting of a rare bird, a feast of wild mountain blueberries, a winter afternoon at the shore - uncover the surprises that even the most familiar landscape can yield. Describing seasonal events such as Potomac valley wildflowers blooming in early spring, shorebirds converging on Delaware Bay mudflats in mid-May, and monarch butterflies migrating over mountain fields in early fall, the author also provides itineraries for visiting some of his favorite spots. Complete with black-and-white watercolor illustrations, maps, an extensive bibliography, and listings of resource organizations, Watching Nature emphasizes the accessibility of the natural world.