Peterson, Roger T. A Field Guide to Western Birds. 366 pp. Houghton Mifflin Co. Boston, 1961. An essential manual for birds of the entire West. Illustrated.
Wilhelm, Eugene J., Jr. Common Birds of Olympic National Park. 54 pp. The Olympic Natural History Assoc. Port Angeles, Wash., 1961. A guide to 116 species by areas in the park. Written by a former ranger-naturalist.
Seashore
Guberlet, Muriel L. Animals of the Seashore. 412 pp. Metropolitan Press. Portland, Oregon, 1936. Illustrations and descriptions of 198 species. A handy reference on the seashore.
Kirk, Ruth. The Olympic Seashore. 79 pp. The Olympic Natural History Assoc. Port Angeles, Wash., 1962. Guide to the human and natural history of the seashore of Olympic National Park, with maps and illustrations.
Ricketts, Edward F. and Calvin, Jack. Between Pacific Tides. 502 pp. Stanford Univ. Press. Palo Alto, Calif., 1952. An account of the habits and habitats of some 500 conspicuous seashore invertebrates.
Guide Book
Kirk, Ruth. Exploring the Olympic Peninsula. 128 pp. Univ. of Washington Press, Seattle, 1964. Guide to the human and natural history of the Olympic Peninsula, including Olympic National Park. With maps and illustrations.
Leissler, Frederick. Roads and Trails of Olympic National Park. 84 pp. Univ. of Washington Press. Seattle, 1957. Guide with maps; very helpful for hikers. Written by former park ranger.