This report summarizes the available knowledge about the mountain beaver, Aplodontia rufa, and lists some 260 literature references. Since the first account in 1805, from the Lewis and Clark expedition, a considerable literature has accumulated, much of which is no longer generally available. The mountain beaver, considered the most primitive of living rodents, is found only on the Pacific coast of North America. Type localities and ranges of the seven races are listed.

An index of woodcock reproductive success in 1961 and 1962 was obtained from age ratios in the hunting kill as determined from wings. For both seasons combined, hunters contributed 25,426 woodcock wings.