Provides a specialized library of over 60,000 volumes focusing on the natural sciences. The library currently receives 650 different titles of periodicals through subscriptions, gifts and inter-institutional exchanges. Also has a large collection of maps, reprint and pamphlet files, slides and audio materials, and some extremely rare book collections of Audubon, Gould, Curtis and North-American Indians. In addition, houses archival records about the Museum, professional papers, and special collections about people/events associated with the Museum.