J David Wiens
I am a Supervisory Research Wildlife Biologist at the Forest and Rangeland Ecosystem Science Center
My research interest include avian ecology, conservation of threatened and endangered species, population dynamics of forest and rangeland raptor species.
Professional Experience
2010 - Present: USGS, Forest and Rangeland Ecosystem Science Center, Supervisory Research Wildlife Biologist, Corvallis, OR
Education and Certifications
Ph.D., Wildlife Science, Oregon State University, Corvallis, OR (2012)
M.S., Ecology, Colorado State University, Fort Collins, CO (2004)
B.S., Environmental Science, Northern Arizona University, Flagstaff, AZ (1993)
Science and Products
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
Distribution, nesting activities, and age-class of territorial pairs of golden eagles at the Altamont Pass Wind Resource Area, California, 2014–16
Spatial demographic models to inform conservation planning of golden eagles in renewable energy landscapes
Potential trophic cascades triggered by the barred owl range expansion
Effects of experimental removal of barred owls on population demography of northern spotted owls in Washington and Oregon—2015 progress report
Estimation of occupancy, breeding success, and predicted abundance of golden eagles (Aquila chrysaetos) in the Diablo Range, California, 2014
Competitive interactions and resource partitioning between northern spotted owls and barred owls in western Oregon
Improving strategies to assess competitive effects of barred owls on northern spotted owls in the Pacific Northwest
To request an interview, contact fresc_outreach@usgs.gov or call (541) 750-1030.
Northern Spotted Owl Still Fights for Survival
Three studies highlight how the interactions between northern spotted owl and the invasive barred owl are intertwined.
Science and Products
- Science
- Data
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
- Multimedia
- Publications
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
Filter Total Items: 31Distribution, nesting activities, and age-class of territorial pairs of golden eagles at the Altamont Pass Wind Resource Area, California, 2014–16
The substantial numbers of golden eagles (Aquila chrysaetos) killed by collisions with oldgeneration wind turbines each year at the Altamont Pass Wind Resource Area (APWRA) in California has been well documented from previous studies. Few eagle nests have been documented in the APWRA, however, and adults and subadults 3+ years of age killed by turbines were generally not associated with nearby terAuthorsPatrick S. Kolar, J. David WiensSpatial demographic models to inform conservation planning of golden eagles in renewable energy landscapes
Spatial demographic models can help guide monitoring and management activities targeting at-risk species, even in cases where baseline data are lacking. Here, we provide an example of how site-specific changes in land use and anthropogenic stressors can be incorporated into a spatial demographic model to investigate effects on population dynamics of Golden Eagles (Aquila chrysaetos). Our study focAuthorsJ. David Wiens, Nathan H. Schumaker, Richard D. Inman, Todd C. Esque, Kathleen M. Longshore, Kenneth E. NussearPotential trophic cascades triggered by the barred owl range expansion
Recently, the barred owl (Strix varia) has expanded its range into the Pacific Northwest of the United States resulting in pronounced effects on the demography and behavior of the northern spotted owl (S. occidentalis caurina). The range expansion has brought together historically allopatric species, creating the potential for significant changes in the avian predator community with possible cascaAuthorsSamantha R. Holm, Barry R. Noon, David Wiens, William J. RippleEffects of experimental removal of barred owls on population demography of northern spotted owls in Washington and Oregon—2015 progress report
Evidence indicates that competition with newly established barred owls (Strix varia) is causing rapid declines in populations of northern spotted owls (Strix occidentalis caurina), and that the longterm persistence of spotted owls may be in question without additional management intervention. A pilot study in California showed that lethal removal of barred owls in combination with habitat conservaAuthorsJ. David Wiens, Katie M. Dugger, Krista E. Lewicki, David C. SimonEstimation of occupancy, breeding success, and predicted abundance of golden eagles (Aquila chrysaetos) in the Diablo Range, California, 2014
We used a multistate occupancy sampling design to estimate occupancy, breeding success, and abundance of territorial pairs of golden eagles (Aquila chrysaetos) in the Diablo Range, California, in 2014. This method uses the spatial pattern of detections and non-detections over repeated visits to survey sites to estimate probabilities of occupancy and successful reproduction while accounting for impAuthorsJ. David Wiens, Patrick S. Kolar, Mark R. Fuller, W. Grainger Hunt, Teresa HuntCompetitive interactions and resource partitioning between northern spotted owls and barred owls in western Oregon
The federally threatened northern spotted owl (Strix occidentalis caurina) is the focus of intensive conservation efforts that have led to much forested land being reserved as habitat for the owl and associated wildlife species throughout the Pacific Northwest of the United States. Recently, however, a relatively new threat to spotted owls has emerged in the form of an invasive competitor: the conAuthorsJ. David Wiens, Robert G. Anthony, Eric D. ForsmanImproving strategies to assess competitive effects of barred owls on northern spotted owls in the Pacific Northwest
A scientific study has determined that survey methods designed for spotted owls do not always detect barred owls that are actually present in spotted owl habitat. The researchers suggest that strategies to address potential interactions between spotted owls and barred owls will require carefully designed surveys that account for response behaviors and imperfect detection of both species. Species-sAuthorsJ. David Wiens, Anne Weekes - News
To request an interview, contact fresc_outreach@usgs.gov or call (541) 750-1030.
Northern Spotted Owl Still Fights for Survival
Three studies highlight how the interactions between northern spotted owl and the invasive barred owl are intertwined.