Title Genres Topics Date (Start) Date (End)
The One hundred most common birds of Polk County, Iowa Reports Theses Bird surveys Birds--Identification Ornithology--Methodology 1926-06-04 N/A
Document regarding the Iowa Breed Bird Atlas Project Administrative records Bird populations Bird surveys Ornithology--Methodology Environmental monitoring Publishers and publishing N/A N/A
Winter Raptor survey, 1977 Field notes Maps (documents) Reports Bird surveys Bird watching Birds of prey Birds--Research Ornithology--Methodology 1977-12-01 1977-12-31