The collection includes "Hunt Logs" that describe each official Roo Rat hunt in detail. Rules of the hunt are printed on the back of the Hunt Logs. Also included are the group's official emblems, flag, and wooden mascot. Nearly 100 photographs document hunts from 1963 until the present date. Of particular interest are the society's clippings, which show the notoriety achieved by this unusual group. The clippings give insight into the aims and purposes of the society, and include quotes by members who believe the group made them more aware of the importance of wildlife conservation. Another set of clippings and articles describe the Kangaroo Rat, its habitat, and efforts to protect it across the United States. The society's correspondence is also of interest because it represents a broad cross-section of people interested in the conservation movement.

Also in the collection are several artifacts, including a model of a kangaroo rat, a license plate with the letters "ROO RAT," and maps that show the location of the first hunt and subsequent hunts made by members of the society.