Images

Biologists measure a grizzly bear’s body length.

Biologists measure a grizzly bear’s paw width. 

Once a grizzly bear is radio collared, biologists can track its movements with telemetry on foot.   

Biologists use a syringe pole to immobilize the captured grizzly bear.  It takes approximately 10 minutes for a bear to become immobilized.  

A biologist prepares to collect biological information from the bear they have captured.  Biologists collect hair samples for genetic analysis, weigh the bear,  and gather numerous measurements of the body, such as the head, paws, claws, teeth, etc.  Overall condition of the bear is assessed as well, including a body fat measurement.

One of the first measurements taken is the bear’s weight using a quadpod and electronic scale. 

A biologist measures a grizzly bear’s head length.

USGS hydrologic technician Deena Green collects streamflow data at streamgage station 12413875, St. Joe River at Red Ives Ranger Station, Idaho

Trask River stage, discharge, and water-quality data are collected and used together to help monitor the current health of the river. Instream equipment is stored in protective housing to protect it from the elements. Data from the river are sent to equipment in the gage house, where it is stored then transmitted to USGS servers.

Newberry Volcano's youngest lava flows. Source: Robinson, J.E., Donnelly-Nolan, J.M., and Jensen, R.A., 2015, Newberry Volcano’s Youngest Lava Flows: U.S. Geological Survey Scientific Investigations Map 3329, 1 sheet, https://dx.doi.org/10.3133/sim3329.

USGS hydrologic technician Jayson Blom collects a groundwater-level measurement from an aquifer monitoring well at the Idaho National Laboratory.

View out over the Crescent Lake landslide from the headscarp (left foreground) of the Red Bluffs landslide, looking toward Stevenson, Washington and the Columbia River.

A USGS grizzly bear researcher snapped this picture of a mother grizzly bear and her cub in Yellowstone National Park. Recent research shows that fffspring of grizzly bear mothers with a history of human-bear conflicts are more likely to be involved in human-bear conflicts than offspring of mothers without a history of human-bear conflicts. 

USGS scientists Kate Allstadt and Cynthia Gardner tell the story of the May 18, 1980 eruption of Mount St. Helens and how the catastrophic landslide, lateral blast, and lahar changed the landscape.

Bathymetry data of Columbia River mouth, derived from an interferometric swath bathymetry systems survey in 2013. A) Swath map of data; B-E) sample detail pull-outs

A U.S. Geological Survey hydrologist collects a water sample from the Williamson River below Chiloquin, Oregon. The sample was analyzed as part of a water-quality study the USGS conducted in cooperation with the U.S. Bureau of Reclamation and the Klamath Tribes.

Debris flow in channel near Butte Camp, Mount St. Helens, Washington.

Path of small debris flows originating above Butte Camp, Mount St. Helens, Washington.

After receiving permission from the homeowner, a U.S. Geological Survey hydrologist collects a water sample from a residential well in Emmett, Idaho. The sample was analyzed as part of a water-quality study the USGS conducted in cooperation with Gem County, Idaho and the Idaho Department of Environmental Quality.

USGS hydrologic technician makes an ADCP measurement by walking across streambed on the Bear River below Alexander Reservoir, Idaho.

USGS hydrologist Mark Reid looks at one of the many grabens (extensional basins) that formed as the Oso landslide swept across the North Fork Stillaguamish River valley.