We surveyed for raptors in forests on study areas in five of the eastern United States. For
Cooper's Hawks (Accipiter cooperi), Red-shouldered Hawks (Buteo lineatus), and Barred …

We compared home range areas and habitat selection of radio-marked Spotted Owls (Strix
occidentalis) and Barred Owls (Strix varia) in an area of sympatry in the northern Cascade …

Barred Owls (Strix varia) are highly vocal and perform a diverse array of vocalizations. They
are often monitored by acoustic surveys, yet Barred Owl vocalizations and vocal behavior …

Abstract Abstract Barred Owls (Strix varia) have expanded their range throughout the ranges
of Northern (Strix occidentalis caurina) and California Spotted Owls (S. o. occidentalis). Field …

The range expansion by barred owls (Strix varia) into western North America has raised
considerable concern regarding their potential effects on declining northern spotted owl …

In the face of human population growth that is transforming the Earth, scientists, land
managers, and planners are working to prevent, mitigate, and reverse the consequent loss …

Most survey protocols for northern spotted owls (Strix occidentalis) assume that 3 surveys
from roads at night are sufficient to document occupation of territories by spotted owls. The 3 …

The northern spotted owl (Strix occidentalis caurina) is a controversial species in the Pacific
Northwest that is listed as threatened under the Endangered Species Act. The barred owl …

The Barred Owl (Strix varia) has rapidly expanded its range into the western United States in
the past century, moving westward across the northern Rocky Mountains and thence …

We estimated owl occurrence (number of individuals per km of trail/night) from spontaneous
calls and responses to broadcast vocalizations, during 12 repetitions of each method over 3 …