A USGS scientist collects a water sample for analysis of mineral particles known as colloids. Toxic metals (such as copper in excess) bind to the particles, which are then ingested by aquatic animals.
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Collecting water sample for analysis of mineral particles (colloids)
A USGS scientist collects a water sample for analysis of mineral particles known as colloids. Toxic metals (such as copper in excess) bind to the particles, which are then ingested by aquatic animals.
Garden Spider (Argiope aurantia)
A female garden spider on its web. 1:11 PM.
A female garden spider on its web. 1:11 PM.
Garden Spider (Argiope aurantia) Egg Sac
White and round egg sac of Argiope aurantia suspended on silk lines on a garden plant.
White and round egg sac of Argiope aurantia suspended on silk lines on a garden plant.
Processing Fish Samples
USGS scientists processing fish samples on the USGS Research Vessel Kaho.
USGS scientists processing fish samples on the USGS Research Vessel Kaho.
Elk in the Firehole River, Yellowstone National Park
This Elk in the River, seemingly oblivious to its many onlookers caused a minor traffic jam on the Park road. The USGS operates a gage on this river.
This Elk in the River, seemingly oblivious to its many onlookers caused a minor traffic jam on the Park road. The USGS operates a gage on this river.
Gibbon River Falls, Yellowstone National Park
Gibbon River falls is a scenic strip along the road in the Park. USGS operates a gage on the Gibbon River.
Gibbon River falls is a scenic strip along the road in the Park. USGS operates a gage on the Gibbon River.
Lower Falls of the Yellowstone River, Yellowstone National Park, WY
This is nearly the same view depicted in the 1872 sketch by Thomas Moran, and printed for the 150th anniversary commemoration of DOI.
This is nearly the same view depicted in the 1872 sketch by Thomas Moran, and printed for the 150th anniversary commemoration of DOI.
Guardian Geyser and Norris Geyser Basin, Yellowstone National Park
Guardian Geyser and Norris Geyser Basin, Yellowstone National Park.
Guardian Geyser and Norris Geyser Basin, Yellowstone National Park.
Preparing to Measure Streamflow from a Bridge
USGS Oklahoma Water Science Center Hydrologic Technician Rick Hanlon prepares to conduct a streamflow measurement off of a bridge over the North Canadian River near Oklahoma City.
USGS Oklahoma Water Science Center Hydrologic Technician Rick Hanlon prepares to conduct a streamflow measurement off of a bridge over the North Canadian River near Oklahoma City.
Researcher weighing a sturgeon
Researcher weighing sturgeon. Columbia River, bottom trawl for young-of-year (YOY) indexing.
Researcher weighing sturgeon. Columbia River, bottom trawl for young-of-year (YOY) indexing.
Stream Gaging Bridge Measurement
USGS Oklahoma Water Science Center Hydrologic Technician James Greer collects streamflow data on bridge over the North Canadian River near Oklahoma City.
USGS Oklahoma Water Science Center Hydrologic Technician James Greer collects streamflow data on bridge over the North Canadian River near Oklahoma City.
Stream Gaging Wading Measurement
USGS Oklahoma Water Science Center Hydrologic Technician Steve Smith collects streamflow data at Blue River at Blue, Oklahoma.
USGS Oklahoma Water Science Center Hydrologic Technician Steve Smith collects streamflow data at Blue River at Blue, Oklahoma.
A Primitive Shelter
Primitive shelter built along side the water.
Primitive shelter built along side the water.
A Primitive Shelter
Primitive shelter built along side the water.
Primitive shelter built along side the water.
Bottlenose Dolphin (Turisiops truncatus)
Bottlenose dolphin surfacing from beneath water.
Bottlenose dolphin surfacing from beneath water.
Bottlenose Dolphin (Turisiops truncatus)
Bottlenose dolphin leaping out of the water.
Bottlenose dolphin leaping out of the water.
Bottlenose Dolphin (Turisiops truncatus)
Bottlenose dolphin surfacing from beneath water.
Bottlenose dolphin surfacing from beneath water.
Bottlenose Dolphin (Turisiops truncatus)
Two bottlenose dolphins leaping from the water.
Two bottlenose dolphins leaping from the water.
Bottlenose Dolphin (Turisiops truncatus)
Three bottlenose dolphins swimming in the water.
Three bottlenose dolphins swimming in the water.
Bottlenose Dolphin (Turisiops truncatus)
Two bottlenose dolphins swimming in the water.
Two bottlenose dolphins swimming in the water.
Bottlenose Dolphin (Turisiops truncatus)
Two bottlenose dolphins swimming in the water.
Two bottlenose dolphins swimming in the water.