Documents • Iowa State University • Avian Archives of Iowa Online

Title	Genres	Topics	Date (Start)	Date (End)	Type	Description	Creator/Author	Birds	Locations

Photograph of a Wood Duck in a house	Photographs	Birds--Research Ornithology--Methodology Birdhouses--Design and construction	1965-01-01	1965-12-31	Manuscript, graphic, and printed material	A Wood Duck looks out of a string covered opening in a Wood Duck house, 1965. The string stretched across the bird house opening was used by Frederic Leopold to determine whether birds had entered or left the nest.	Leopold, Frederic, 1895-1989	Wood Duck	Burlington	Frederic Leopold Papers \| MS 113	6	6
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	Manuscript, graphic, and printed material	A wooden Wood Duck house attached to the side of tree trunk, May 1966. The opening to the duck house is covered by a piece of paper that is fastened with string.	Leopold, Frederic, 1895-1989	Wood Duck	Burlington	Frederic Leopold Papers \| MS 113	6	14