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
Rare bird documentation form for Pine Siskin at Anderson Township in Mills County, 1982 Field notes Birds--Identification Ornithology Rare birds 1982-05-15 N/A
Rare bird documentation form for House Finch at Davenport, 1986 Field notes Birds--Identification Ornithology Rare birds 1986-12-21 N/A
Rare bird documentation form for House Finch at Iowa City, 1986 Field notes Bird feeders Birds--Behavior Birds--Identification Ornithology Rare birds 1986-05-10 N/A
Rare bird documentation form for Purple Finch at the Croton Unit at Shimek State Forest, 1985 Field notes Birds--Behavior Birds--Identification Ornithology Rare birds 1985-08-28 N/A
Rare bird documentation form for Pine Grosbeak at Cedar Hills Sand Prairie, 1989 Field notes Birds--Identification Ornithology Rare birds 1989-12-17 N/A
Rare bird documentation form for Pine Grosbeak at State Forest Nursery in Ames, 1986 Field notes Birds--Identification Birdsongs Ornithology Ornithology--Technique Rare birds 1986-08-24 N/A
Rare bird documentation form for Pine Grosbeak at Glendale Cemetery in Des Moines, 1985 Field notes Birds--Behavior Birds--Identification Ornithology Rare birds 1985-02-15 N/A
Rare bird documentation form for Pine Grosbeak at Lamoni, 1984 Field notes Birds--Identification Ornithology Rare birds 1984-11-08 N/A
Rare bird documentation form for Pine Grosbeak at Denver, 1984 Field notes Bird feeders Birds--Behavior Birds--Identification Ornithology Rare birds 1984-02-12 N/A
Rare bird documentation form for Pine Grosbeak at State Center, 1981 Field notes Bird feeders Birds--Identification Ornithology Rare birds 1981-03-08 N/A
A ten year calendar of three hundred and eighty-one wild birds of Iowa Checklists Field notes Bird watching Ornithology--Bibliography 1919-04-25 N/A
Jim Dinsmore letter to Thomas Kent regarding birds sighted by himself and others, November 19, 1980 Correspondence Field notes Bird watching Ornithology--Bibliography 1980-11-19 N/A
Vernon M. Kleen letter to Peter C. Petersen regarding field notes from the 1960s, January 19, 1989 Correspondence Field notes Bird watching Birds--Migration Birds--Research Ornithology--Methodology 1989-01-19 N/A
Robert L. Nelson letter to Peter C. Petersen regarding spring migration, June 14, 1963 Correspondence Field notes Bird watching Birds--Migration Birds--Research Ornithology--Methodology 1963-06-14 N/A
Tim C. Moermond and Mike Orthel letter to Peter C. Petersen regarding spring migration, May 28, 1963 Artifacts (object genre) Correspondence Field notes Bird watching Birds--Migration Birds--Research Ornithology--Methodology 1963-05-28 N/A
Pearl Knoop letter to Peter C. Petersen regarding spring migration, June 4, 1963 Correspondence Field notes Bird watching Birds--Migration Birds--Research Ornithology--Methodology 1963-06-04 N/A
Ruth Upp letter to Peter C. Petersen regarding bird sightings, March 16, 1963 Correspondence Field notes Bird watching Birds--Research Ornithology--Methodology 1963-03-16 N/A
Audubon field notes, winter migration, 1963 Field notes Bird watching Birds--Migration Birds--Research Ornithology--Methodology 1963-03-31 N/A
Pearl Knoop letter to Peter C. Petersen regarding field notes, winter 1963 Correspondence Field notes Bird watching Birds--Research Ornithology--Methodology 1963-04-08 N/A
Tim C. Moermond letter to Peter C. Petersen regarding field notes, winter 1963 Correspondence Field notes Bird watching Birds--Migration Birds--Research Ornithology--Methodology 1963-04-03 N/A
Tim C. Moermond letter to Peter C. Petersen regarding field notes, fall 1962 Correspondence Field notes Bird watching Birds--Research Ornithology--Methodology 1962-12-17 N/A
Florence McCaughey letter to Peter C. Petersen regarding 1962 fall migration report, December 6, 1962 Correspondence Field notes Bird watching Birds--Migration Birds--Research Ornithology--Methodology 1962-12-06 N/A
Pearl Knoop letter to Peter C. Petersen regarding fall migration, December 15, 1962 Correspondence Field notes Bird watching Birds--Migration Birds--Research Ornithology--Methodology 1962-12-15 N/A
Audubon field notes, fall migration,1962 Field notes Bird watching Birds--Migration Birds--Research Ornithology--Methodology 1962-12-04 N/A