Title Genres Topics Date (Start) Date (End)
Breeding Bird Atlas research notes through 1988 Maps (documents) Research notes Bird populations Birds--Counting Birds--Habitat Birds--Identification Ornithology--Societies, etc 1988-01-01 1988-12-31
Gladys Black letter to Vernon Kleen regarding Red Rock Refuge and the Evening Grosbeak invasion, February 1976 Correspondence Field notes Maps (documents) Bird populations Bird watching Birds--Counting Birds--Research Ornithology--Methodology 1976-02-01 1976-02-29
Gladys Black letter to Vernon M. Kleen regarding Snowy Owl counts, March 5, 1977 Correspondence Field notes Maps (documents) Bird watching Birds--Counting Birds--Research Ornithology--Methodology 1977-03-05 N/A
Iowa Snowy Owls, 1976-1977 contributed by Gladys Black Field notes Maps (documents) Bird watching Birds--Counting Birds--Research Ornithology--Methodology 1976-12-01 1977-02-28
Gladys Black letter to Vernon M. Kleen regarding bird sightings, January 10, 1977 Correspondence Field notes Maps (documents) Bird declines Bird watching Birds--Counting Birds--Research Ornithology--Methodology 1977-01-10 N/A
Iowa map with Snowy Owl sightings, 1976-1977 Field notes Maps (documents) Bird populations Bird watching Birds--Counting Birds--Research 1977-01-01 1977-12-31
Iowa map with Evening Grosbeak sightings, winter 1977-1978 Field notes Maps (documents) Bird watching Birds--Counting 1977-11-28 N/A
Documents regarding the 1992 Boone Christmas Bird Count Checklists Instructions (document genre) Maps (documents) Bird surveys Bird watching Birds--Counting 1992-01-01 1992-12-31