Title Genres Topics Date (Start) Date (End)
Photograph of Frederic Leopold on a ladder checking a Wood Duck house Photographs Bird watchers Birds--Research Birdhouses 1965-01-01 1965-12-31
Photograph of Frederic Leopold pulling a sled Photographs Winter Cross-country skiing N/A N/A
Photograph of Frederic Leopold's house with a Wood Duck house in a tree Photographs Birds--Research Wildlife conservationists Birdhouses 1966-01-01 1966-12-31
Photograph of Iowa Ornithologists' Union presidents Photographs Bird watchers Ornithology--Societies, etc 1933-05-06 N/A
Photograph of mother Wood Duck and ducklings inside a duck house Photographs Birds--Research Birdhouses Ducklings Wood duck--Behavior 1971-06-01 1977-06-30
Photograph of mother Wood Duck sitting on eggs in a duck house Photographs Birds--Eggs Birds--Research Birdhouses Eggs--Incubation Wood duck--Behavior 1966-01-01 1966-12-31
Photograph of Northern Saw-whet Owl, 1996 Photographs Birds--Identification Ornithology Photography of birds Rare birds 1996-02-11 N/A
Photograph of paper covering the entrance to a Wood Duck house Photographs Birds--Research Ornithology--Methodology Birdhouses--Design and construction 1966-05-01 1966-05-31
Photograph of recently hatched Wood Duck ducklings and egg shells in a duck house Photographs Birds--Eggs Birds--Research Ducklings 1966-05-01 1966-05-31
Photograph of Red Crossbill, 1990 Field notes Photographs Birds--Identification Photography of birds 1990-07-31 1990-08-01
Photograph of shore birds feeding on a pond Photographs Birds--Food 1925-05-24 N/A
Photograph of Smith's Longspur, 1990 Field notes Photographs Bird watching Birds--Identification Photography of birds 1990-04-12 1990-07-31
Photograph of the contents found in a Great Horned Owl nest Photographs Birds--Food Bird droppings 1935-04-04 N/A
Photograph of the inside bottom of a Wood Duck house Photographs Birds--Research Birdhouses 1965-01-01 1965-12-31
Photograph of three hatching Wood Duck eggs Photographs Birds--Eggs Birds--Research 1971-07-01 1971-07-31
Photograph of three Red-shouldered Hawks in a nest Photographs Birds--Infancy 1941-05-18 N/A
Photograph of three young Crows in a nest Photographs Birds--Infancy 1927-05-16 N/A
Photograph of two young Eared Grebes Photographs Birds--Infancy 1924-06-19 N/A
Photograph of Walter Rosene posing with owls Photographs Bird watchers Strigiformes | Owls 1929-04-28 N/A
Photograph of Walter Rosene reading poems on a field trip in McGregor Heights Photographs Bird watchers N/A N/A
Photograph of Walter W. Bennett photographing a Pintail Duck nest Photographs Bird watchers Photography of birds 1924-06-21 N/A
Photograph of Wood Duck ducklings in a duck house Photographs Birds--Research Birdhouses Ducklings Wood duck--Behavior 1977-05-01 1977-05-31
Photograph of Wood Duck ducklings leaving the duck house Photographs Birds--Research Birdhouses Ducklings Wood duck--Behavior N/A N/A
Photograph of Wood Duck ducklings nesting among egg shells and nesting material Photographs Birds--Eggs Birds--Research Ducklings 1966-05-01 1966-05-31
Photograph of Wood Duck ducklings swimming Photographs Birds--Research Ducklings Wood duck--Behavior 1971-06-01 1977-06-30