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
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
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
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
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
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
Dick Bierman letter to Nicholas S. Halmi regarding spring bird sightings, May 28, 1979 Correspondence Field notes Reports Bird watching Birds--Migration Birds--Nests Anseriformes | Ducks, Geese, and Swans Gaviiformes | Loons Rare birds Parulidae | Warblers 1979-05-28 N/A
Darwin Koenig letter to Nicholas S. Halmi regarding spring bird sightings, June 4, 1979 Correspondence Field notes Bird watching Birds--Nests 1979-06-04 N/A
Ross Silcock letter to Thomas H. Kent regarding bird sightings, August 5, 1979 Correspondence Field notes Bird banding Bird watching Birds--Counting Birds--Nests Birds--Research 1979-08-05 N/A
Carl Priebe letter to Richard Bishop regarding bird sightings, July 27, 1979 Correspondence Field notes Bird watching Birds--Habitat Birds--Nests 1979-07-27 N/A
Dorothy A. Brunner letter to Thomas H. Kent regarding bird sightings, May 28, 1980 Correspondence Field notes Bird watching Birds--Nests Birds--Research Accipitridae | Hawks and Eagles Ornithology--Methodology Hirundinidae | Swallows Turdidae | Thrushes Vireonidae | Vireos Parulidae | Warblers 1980-05-28 N/A
James J. Dinsmore letter to Thomas H. Kent regarding bird sightings, May 27, 1980 Correspondence Field notes Bird watching Birds--Nests Birdsongs Birds--Research Ornithology--Methodology 1980-05-27 N/A
Ione Getscher letter to Thomas H. Kent regarding bird sightings, May 19, 1980 Correspondence Field notes Bird watching Birds--Migration Birds--Nests Birds--Research Anseriformes | Ducks, Geese, and Swans Ornithology--Methodology Parulidae | Warblers 1980-05-19 N/A
Darwin Koenig letter to Thomas H. Kent regarding bird sightings, May 28, 1980 Correspondence Field notes Bird watching Birds--Nests Birds--Research Ornithology--Methodology 1980-05-28 N/A
Francis L. Moore letter to Thomas H. Kent regarding bird sightings, May 30, 1980 Correspondence Field notes Bird watching Birds--Counting Birds--Nests Birdsongs Laridae | Gulls and Terns Accipitridae | Hawks and Eagles Phasianidae | Pheasants, Turkeys, and Grouse Laniidae | Shrikes Fringillidae | Finches Vireonidae | Vireos Parulidae | Warblers Bombycillidae | Waxwings Birds--Feeding and feeds 1980-05-30 N/A
Gladys Black letter to Thomas H. Kent regarding bird sightings, July 30, 1980 Correspondence Field notes Bird watching Birds--Counting Birds--Nests Fringillidae | Finches Troglodytidae | Wrens Songbirds 1980-07-30 N/A
Richard Jule Hollis letter to Thomas H. Kent regarding Cliff Swallows, August 14, 1980 Correspondence Reports Birds--Counting Birds--Eggs Birds--Nests 1980-08-14 N/A