Title Genres Topics Date (Start) Date (End)
Douglas C. Harr letter to Peter C. Petersen regarding bird sightings, June 23, 1977 Correspondence Field notes Bird banding Bird watching Birds--Research 1977-06-23 N/A
Contributors to Field Report Field notes Bird watchers Bird watching 1976-06-01 1976-07-31
Breeding Bird Atlas history Administrative records Bird populations Bird surveys Environmental monitoring 1992-01-01 1992-12-31
Big Bluestem Audubon Society Birdathon flyer Fliers (printed matter) Bird surveys Bird watching Birds--Counting 1998-05-09 N/A
Audubon field notes, winter migration, 1963 Field notes Bird watching Birds--Migration Birds--Research Ornithology--Methodology 1963-03-31 N/A