Filters: Tags: Rough-legged hawk (X)
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FY2011Research is showing that populations of wintering raptors, including Northern Harriers, Rough-Legged Hawks, Prairie Falcons, American Kestrels. Red-Tailed Hawks and Golden Eagles, have stayed relatively constant in the last 20 years are being used by the Bureau of Land Management and Idaho Army National Guard in developing raptor conservation management practices. The American Wind and WildlifeInstitute will also use the results for their wind energy siting support tools.
There is widespread evidence that multiple drivers of global change, such as habitat degradation, invasive species, and climate change, are influencing wildlife. Understanding how these drivers interact with and affect species may be difficult because outcomes depend on the magnitude and duration of environmental change and the life history of the organism. In addition, various environmental drivers may be evaluated and managed at different spatial scales. We used a historical dataset from 1991 to 1994 and current information from 2010 to 2012 to examine whether occupancy patterns of wintering raptors were consistent with regional changes in distribution or habitat conditions within a local management unit, the...
Documented occurrences for peregrine falcon, gyrfalcon, and rough-legged hawk. Current distribution of raptor concentration areas. Changes in mean summer (June, July, and August) temperature (2010s to 2060s) within the modeled raptor concentration area. Length of growing season at current, near-term future (2020s), and long-term future (2060s) time intervals within the modeled raptor concentration. Spring precipitation (March, April, and May) in mm within the modeled distribution of raptor concentration areas. Current, 2040 medium-development scenario, and 2040 high-development scenario landscape condition within the current raptor concentration areas in the North Slope study area. These data are provided by Bureau...
Studies of multiple taxa across broad-scales suggest that species distributions are shifting poleward in response to global climate change. Recognizing the influence of distribution shifts on population indices will be an important part of interpreting trends within management units because current practice often assumes that changes in local populations reflect local habitat conditions. However, the individual- and population-level processes that drive distribution shifts may occur across a large, regional scale and have little to do with the habitats within the management unit. We examined the latitudinal center of abundance for the winter distributions of six western North America raptor species using Christmas...
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