I am a Scientist Emeritus at the USGS Forest and Rangeland Ecosystem Science Center
Education and Certifications
Ph.D., Ecology and Behavioral Biology, minor Wildlife Biology, University of Minnesota (1979)
M.S., Zoology, Central Washington University (1971)
B.S., Biology, Colorado State University (1968)
Science and Products
Spatial Ecology of Wide-Ranging Birds
Flight facilitates comparatively rapid access to large areas, and the study of the movements of birds is essential for learning their relationships to their environment, and for managing the resources on which they depend and conserving the communities in which they live. Often the amount of space used by raptors varies with behavior associated with the birds’ ages and with the annual cycle. For...
Raptor Biology, Ecology, and Land-Use Effects
We study aspects of basic biology and ecology of predators to contribute to understanding ecosystems and to provide results that can be applied to the conservation of natural resources. Subject matter includes behavior and relationships of birds to features of their environment such as habitat, prey, and contaminants.
Raptor Surveys and Monitoring
This research largely involves developing and applying survey methods to gather and analyze data to study raptor population biology and population status. Results also provide land and wildlife managers with information about the general distribution and local occurrence of birds of prey. Most raptor species occur in low densities compared to other birds. Raptors are widely dispersed during much...
Information for Golden Eagle Management
This work provides basic information for managing golden eagles in the context of the Bald and Golden Eagle Protection Act (16 U.S.C. 668-668d). The recent development of energy resources, such as wind, oil, gas, and solar, can potentially affect landscapes in ways that require changes in golden eagle management practices. Our work emphasizes priority information needs identified by the USGS and U...
Science and Products
- Publications
- Science
Spatial Ecology of Wide-Ranging Birds
Flight facilitates comparatively rapid access to large areas, and the study of the movements of birds is essential for learning their relationships to their environment, and for managing the resources on which they depend and conserving the communities in which they live. Often the amount of space used by raptors varies with behavior associated with the birds’ ages and with the annual cycle. For...Raptor Biology, Ecology, and Land-Use Effects
We study aspects of basic biology and ecology of predators to contribute to understanding ecosystems and to provide results that can be applied to the conservation of natural resources. Subject matter includes behavior and relationships of birds to features of their environment such as habitat, prey, and contaminants.Raptor Surveys and Monitoring
This research largely involves developing and applying survey methods to gather and analyze data to study raptor population biology and population status. Results also provide land and wildlife managers with information about the general distribution and local occurrence of birds of prey. Most raptor species occur in low densities compared to other birds. Raptors are widely dispersed during much...Information for Golden Eagle Management
This work provides basic information for managing golden eagles in the context of the Bald and Golden Eagle Protection Act (16 U.S.C. 668-668d). The recent development of energy resources, such as wind, oil, gas, and solar, can potentially affect landscapes in ways that require changes in golden eagle management practices. Our work emphasizes priority information needs identified by the USGS and U... - Data