Description: Papers of Richard Rex Graber (1924-1997) and Jean W. Graber (1924- ), Wildlife Specialists and Professional Scientists at the Illinois Natural History Survey Center for Wildlife Ecology (1956-83) include publications by Richard and Jean Graber; Illinois bird species notes (in taxonomic order); nesting records; bird field observation lists by Graber (ca. 1956-87) or collected by Richard and Jean Graber from others (ca. 1903-87); notebooks and diaries of early Illinois Ornithologists Benjamin T. Gault (1873-1927), Alfred O. Gross (assistant to Stephen Forbes, 1907-09); and Thomas E. Musselman 1908-12, 1929-70); frequency studies of Illinois Christmas Bird Counts; habitat studies and censuses (ca. 1957-81), seasonal bird censuses (1964-81); studies of audio detection of nocturnal migration (1957-60); correspondence with field note contributors for "Audubon Field Notes" (published by National Audubon Society) with field notes editors R. E. Mumford and Richard Graber (1958-62); bibliographical notes on birds; and proof sheets and boards for publications by Richard and Jean Graber of maps, graphs, charts, drawings, and photographs.