News

Recent declines in aspen populations have occurred in the western U.S., especially along drought-sensitive margins of its range or where fire...

Big sagebrush ecosystems are particularly sensitive to wildfires and life history information on big sagebrush is scarce and vital for restoration...

Species distribution models help researchers explore how environmental conditions influence the spatial pattern of species occurrence over large areas...

Golden eagles have only been recently studied in Yellowstone National Park and their status is still unknown.

Amphibian decline is a global conservation crisis driven by multiple interacting stressors, which often act at a local scale with global implications.

USGS researchers are beginning a new technical assistance study to help identify the current distribution of Foothill Yellow-Legged Frogs in Oregon.

Although feathers are commonly used to monitor mercury in birds, their reliability has not been assessed for many avian species, including most...

In 2000, the USGS Amphibian Research and Monitoring Initiative - or ARMI - was established, under the direction of the President and Congress, in...

The Willamette River basin in western Oregon is a system with legacy mercury contamination from both mining and reservoirs

Climate change is increasing extreme droughts events, posing a threat to freshwater ecosystems, particularly with human demands for diminishing water...