Photograph taken from a Colorado National Guard helicopter looking north down the West Salt Creek rock avalanche deposit. On May 25, 2014, the central core of the rock avalanche deposit continued to move for 1-2 hours after the main rock avalanche deposit had stopped moving.
Images
Images described and linked on this webpage come from a wide variety of USGS science activities and presentations performed by USGS Science Center staff members in the Region 7: Upper Colorado Basin. A search tool is provided to narrow the number of image files shown.
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Salt Creek Rock Avalanche in Western Colorado
Photograph taken from a Colorado National Guard helicopter looking north down the West Salt Creek rock avalanche deposit. On May 25, 2014, the central core of the rock avalanche deposit continued to move for 1-2 hours after the main rock avalanche deposit had stopped moving.
Measuring streamflow on Dry Piney Creek
Measuring streamflow on Dry Piney Creek
Preparing to measure water level in streambank piezometer, New Fork R
Preparing to measure water level in streambank piezometer, New Fork RPreparing to measure water level in streambank piezometer, New Fork R
Preparing to measure water level in streambank piezometer, New Fork R
Preparing to measure water level in streambank piezometer, New Fork RPreparing to measure water level in streambank piezometer, New Fork R
Panorama of Silverton, Colorado
Panoramic photo of Silverton, Colorado, with Sultan Mountain in the distance. Silverton is the town most directly affected by the Gold King mine blowout.
Panoramic photo of Silverton, Colorado, with Sultan Mountain in the distance. Silverton is the town most directly affected by the Gold King mine blowout.
Wade fishing on Big Horn River
Wade fishing on Big Horn River
Two anglers wade fishing on Big Horn River
Two anglers wade fishing on Big Horn River, Wyoming
Two anglers wade fishing on Big Horn River, Wyoming
Whitebark pine cone and seeds.
Image of whitebark pine cone and seeds.
Image of whitebark pine cone and seeds.
Culvert trap and bait
Biologists use road-killed ungulates such as deer, elk, or bison as bait in the traps.
Biologists use road-killed ungulates such as deer, elk, or bison as bait in the traps.
Ready to remove from the trap
Biologists have immobilized the bear and prepare to lift it out of the trap and onto the tarp for data collection. Once on the tarp the bear is easier to move.
Biologists have immobilized the bear and prepare to lift it out of the trap and onto the tarp for data collection. Once on the tarp the bear is easier to move.
Close up
The kerchief over the grizzly bear’s eyes protects it from dust and debris and reduces visual stimulation. The small tubing in its nose, known as a nasal cannula, delivers oxygen to the animal while it is tranquilized.
The kerchief over the grizzly bear’s eyes protects it from dust and debris and reduces visual stimulation. The small tubing in its nose, known as a nasal cannula, delivers oxygen to the animal while it is tranquilized.
Getting the bear's weight
One of the first measurements taken is the bear’s weight using a quadpod and electronic scale.
One of the first measurements taken is the bear’s weight using a quadpod and electronic scale.
Assessing body fat percentage of grizzly bear
Field personnel use bioelectrical impedance to assess body fat percentage of captured bears. The procedure is similar to how body fat is measured in humans and is based on the resistance of body tissues to the flow of a small, harmless electrical signal.
Field personnel use bioelectrical impedance to assess body fat percentage of captured bears. The procedure is similar to how body fat is measured in humans and is based on the resistance of body tissues to the flow of a small, harmless electrical signal.
Culvert trap
Biologists place a culvert trap in locations that they need data from. Field crews will set up the culvert trap and check it daily, usually in the morning, to determine if a bear has been captured. Additionally, trap doors are checked via radio telemetry.
Biologists place a culvert trap in locations that they need data from. Field crews will set up the culvert trap and check it daily, usually in the morning, to determine if a bear has been captured. Additionally, trap doors are checked via radio telemetry.
Measuring the bear's head length
A biologist measures a grizzly bear’s head length.
A biologist measures a grizzly bear’s head length.
Fitting a radio collar
Biologists with IGBST and the National Park Service fit a grizzly bear with a radio collar. Once a bear is radio collared, biologists can track its movements with telemetry.
Biologists with IGBST and the National Park Service fit a grizzly bear with a radio collar. Once a bear is radio collared, biologists can track its movements with telemetry.
At the capture site
At capture sites with road access, biologists drive to a trap with a bear inside to set up for collecting biological data.
At capture sites with road access, biologists drive to a trap with a bear inside to set up for collecting biological data.
Preparing for collection of samples
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.
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.
Telemetry by air
Once a grizzly bear is radio collared, biologists can track its movements with telemetry via airplane. The IGBST also used the latest telemetry technologies, which allows downloading of GPS data from the radio collar via satellites.
Once a grizzly bear is radio collared, biologists can track its movements with telemetry via airplane. The IGBST also used the latest telemetry technologies, which allows downloading of GPS data from the radio collar via satellites.
Measuring the bear's body length
Biologists measure a grizzly bear’s body length.
Biologists measure a grizzly bear’s body length.
Telemetry by foot
Once a grizzly bear is radio collared, biologists can track its movements with telemetry on foot.
Once a grizzly bear is radio collared, biologists can track its movements with telemetry on foot.
An immobilized bear.
Biologists use a syringe pole to immobilize the captured grizzly bear. It takes approximately 10 minutes for a bear to become immobilized.
Biologists use a syringe pole to immobilize the captured grizzly bear. It takes approximately 10 minutes for a bear to become immobilized.