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ABSTRACT Barred Owls (Strix varia) historically inhabited the forests of eastern North America. During the last century, they expanded their range to include forests throughout the southern provincesExpand
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Range Expansion of Barred Owls, Part I: Chronology and Distribution
Abstract During the past century, Barred Owls (Strix varia) expanded their range from forests east of the Great Plains to forests throughout most of central and western North America. Here in Part I,Expand
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Range Expansion of Barred Owls, Part II: Facilitating Ecological Changes
Abstract In Part I (Livezey, 2009), I presented the chronology and distribution of the range expansion of Barred Owls (Strix varia) from the late 1800s to the present. Here I explore what hadExpand
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Distribution, numbers, and site characteristics of spotted owls and barred owls in the Cascade Mountains of Washington
--We analyzed distribution, numbers, and site characteristics of northern Spotted Owls (Strix occidentalis caurina) and northern Barred Owls (Strix varia varia) in Gifford Pinchot National Forest,Expand
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Burrowing Owl nest success and burrow longevity in north central Oregon
We studied nest success, burrow longevity, and rates of burrow reuse for a migratory population of Bur- rowing Owl (Athene cunictdaria) in north central Oregon from 1995 to 1997. Nest success variedExpand
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Habitat Selection by Northern Sagebrush Lizards (Sceloporus graciosus graciosus) in the Columbia Basin, Oregon
Habitat selection by northern sagebrush lizards (Sceloporus graciosus graciosus) was investigated on the US Navy's 19,400-ha Naval Weapons Systems Training Facility Boardman near Boardman, Oregon, asExpand
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Database of Bird Flight Initiation Distances to Assist in Estimating Effects from Human Disturbance and Delineating Buffer Areas
Abstract U.S. Fish and Wildlife Service biologists determine effects from disturbance to threatened and endangered bird species, and staffs of federal and state agencies estimate these effects whenExpand
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Killing Barred Owls to Help Spotted Owls I: A Global Perspective
Abstract Barred Owls (Strix varia) expanded their range to include western North America and have been competing with federally threatened Northern Spotted Owls (S. occidentalis caurina) for the pastExpand
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An Approach to Identifying Bird Songs: A Key to more than 300 Songs in the Pipeline Road Area, Soberanía National Park, Panama
Background: Identifying bird songs is an integral part of censusing, watching, and enjoying birds. However, doing so can be difficult due to the large variety of songs and, often, subtle differencesExpand
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Spotted Owls, Barred Owls, and Late-Successional Reserves
STRIX OCCIDENTALIS, S. VARIA Y BOSQUES PROTEGIDOS EN SUCESION TARDIA La estrategia de conservacion de la lechuza amenazada a nivel federal Strix occidentalis caurina, trazada en el Plan de BosquesExpand
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