Title Genres Topics Date (Start) Date (End)
Pearl Knoop letter to Peter C. Petersen regarding fall migration, August 17, 1963 Correspondence Field notes Bird watching Birds--Migration Birds--Nests Birds--Research Ornithology--Methodology 1963-08-17 N/A
Pearl Knoop letter to Peter C. Petersen regarding nesting season, August 21, 1964 Correspondence Field notes Bird watching Birds--Migration Birds--Nests Birds--Research Ornithology--Methodology 1964-08-21 N/A
Audubon field notes summer migration 1964 contributed by Woodward H. Brown Field notes Bird declines Bird populations Bird watching Birds--Migration Birds--Nests Birds--Research Ornithology--Methodology Weather 1964-06-01 1964-07-31
Audubon field notes, summer 1968 Field notes Bird watching Birds--Nests Ciconiiformes | Herons, Bitterns, Egrets, Ibises, and Storks Phalaropus | Phalaropes Parulidae | Warblers Weather 1968-06-01 1968-07-31
Gladys Black letter to Peter C. Petersen regarding spring migration at Red Rock Refuge, June 12, 1970 Correspondence Field notes Bird watching Birds--Counting Birds--Migration Birds--Nests 1970-06-12 N/A
Nesting season 1971, Pleasantville, Marion County, Iowa and Red Rock Refuge Field notes Bird watching Birds--Nests 1971-06-01 1971-07-31
Gladys Black letter to Vernon M. Kleen regarding changes in habitat and birds sighted at Red Rock Refuge during 1968-1970, April 7, 1971 Correspondence Field notes Bird watching Birds--Habitat Birds--Nests 1971-04-07 N/A
Red Rock Lake, Red Rock Refuge, Iowa, spring 1973 Field notes Bird watching Birds--Nests Birds--Research Environmental monitoring 1973-03-01 1973-05-31
Gladys Black letters to Vernon M. Kleen regarding fall migration and nesting season, 1974 Correspondence Field notes Bird watching Birds--Migration Birds--Nests Habitat (Ecology) Radio and television tower bird strikes 1974-08-01 1974-11-30
Letter from Robert Jessen to Vernon M. Kleen regarding birds sighted near Oskaloosa, summer 1974 Correspondence Field notes Bird watching Birds--Nests Birds--Research Troglodytidae | Wrens 1974-06-01 1974-07-31
Letter and bird sighting checklist from Robert and Valerie Jessen to Vernon M. Kleen, spring migration 1974 Checklists Correspondence Field notes Bird banding Bird populations Bird watching Birds--Behavior Birds--Nests Falconiformes | Hawks, Eagles, Falcons, Osprey, and Vultures 1974-03-01 1974-05-31
Gladys Black letter and report to Vernon M. Kleen regarding winter Red Rock Lake area bird sightings, March 6, 1974 Correspondence Field notes Bird populations Bird watching Birds--Nests Birds--Research 1974-03-06 N/A
Robert Jessen letter to Vernon M. Kleen regarding birds sighted in Mahaska County during winter, April 2, 1974 Correspondence Field notes Bird banding Bird watching Birds--Counting Birds--Nests 1974-04-02 N/A
Gladys Black letter to Vernon M. Kleen regarding birds sighted during breeding season 1975, August 5, 1975 Correspondence Field notes Bird watching Birds--Nests Birds--Research Ornithology--Methodology Radio and television tower bird strikes 1975-08-05 N/A
Lake Red Rock & Refuge & Pleasantville, summer 1976 Field notes Bird watching Birds--Nests Birds--Research Ornithology--Methodology 1976-10-15 N/A
Iowa Ornithologists' Union, Quarterly field report, summer 1967 and Audubon field notes for Iowa, summer 1967 Field notes Bird watching Birds--Nests Birds--Research Ornithology--Methodology Laniidae | Shrikes Parulidae | Warblers 1967-06-01 1967-07-31
Gladys Black letter to Nicholas S. Halmi regarding bird sightings, January 21, 1977 Correspondence Field notes Bird surveys Bird watching Birds--Identification Birds--Nests Birds--Research Turdidae | Thrushes 1977-01-21 N/A
Gladys Black letter to Nicholas S. Halmi regarding bird watching, April 27, 1977 Correspondence Field notes Bird watching Birds--Nests Rare birds Predation (Biology) 1977-04-27 N/A
Field report, Cedar Rapids area Field notes Bird watching Birds--Nests N/A N/A
Charlotte Scott letter to Nicholas S. Scott regarding blue-listed birds, June 7, 1977 Correspondence Field notes Bird watching Birds--Conservation Birds--Nests 1977-06-07 N/A
Ross W. Silcock letter to Nicholas S. Halmi regarding bird sightings, June 3, 1978 Correspondence Field notes Bird watching Birds--Nests Birds--Research Charadriiformes | Shore-birds, Gulls, and Auks 1978-06-03 N/A
Field reports Field notes Bird watching Birds--Nests Birds--Research 1978-03-01 1978-05-31
Summer report, June 1 - July 30 Field notes Birds--Counting Birds--Nests Birds--Infancy 1978-06-01 1978-07-31
1978 summer bird report, Red Rock area Field notes Bird watching Birds--Counting Birds--Nests 1978-06-01 1978-07-31
Summer observations, 1978, Northwest Iowa Field notes Bird watching Birds--Breeding Birds--Nests 1978-06-01 1978-07-31