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Factors Affecting The Population Of Raptorial Birds On Sauvie Island, Oregon, Jeffry Gottfried
Factors Affecting The Population Of Raptorial Birds On Sauvie Island, Oregon, Jeffry Gottfried
Dissertations and Theses
This study is an analysis of the various factors affecting the population of raptorial birds on Sauvie Island, Oregon. A census of diurnal and nocturnal raptors was carried out along with an analysis of food habits. Once the major prey species were determined they were censused, and the effects of the land management practices on their numbers was investigated. In addition, 100 randomly selected nest boxes were sampled so as to determine the extent to which raptors were making use of them. Red-tailed hawk and Great Horned Owl nests were located.
It was found that four diurnal raptors and three …