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Image: Downstream Rio Nigua at Camp Santiago
Downstream Rio Nigua at Camp Santiago
Downstream Rio Nigua at Camp Santiago
Downstream Rio Nigua at Camp Santiago

This is a downstream view of the Río Nigua at Camp Santiago. The stream is dry. The location is about 17º59'50"N, 66º17'15" W and the elevation is about 15 m.

This is a downstream view of the Río Nigua at Camp Santiago. The stream is dry. The location is about 17º59'50"N, 66º17'15" W and the elevation is about 15 m.

Scientist working at well
Well in Brunswick, GA
Well in Brunswick, GA
Well in Brunswick, GA

Well, Brunswick, GA; Welby Stayton installing groundwater monitoring equipment in a flowing well.

Well, Brunswick, GA; Welby Stayton installing groundwater monitoring equipment in a flowing well.

Image: Hydrographer with Holes
Hydrographer with Holes
Hydrographer with Holes
Hydrographer with Holes

Nick Stasulis, a hydrologic technician with the Maine Office of the New England Water Science Center, is seen here making a discharge measurement through the ice on the Sheepscot River at North Whitefield, USGS station number 01038000.

Nick Stasulis, a hydrologic technician with the Maine Office of the New England Water Science Center, is seen here making a discharge measurement through the ice on the Sheepscot River at North Whitefield, USGS station number 01038000.

Image: Vog from Kilauea
Vog from Kilauea
Vog from Kilauea
Vog from Kilauea

The rim of Kīlauea Volcano’s summit caldera, normally clear on trade-wind days (left), became nearly obscured by vog (right) on some non-trade wind days beginning in 2008, when sulfur dioxide emissions from the volcano’s summit increased to unusually high levels. (This photo has been edited.)

The rim of Kīlauea Volcano’s summit caldera, normally clear on trade-wind days (left), became nearly obscured by vog (right) on some non-trade wind days beginning in 2008, when sulfur dioxide emissions from the volcano’s summit increased to unusually high levels. (This photo has been edited.)

Image: Preening Anhinga
Preening Anhinga
Preening Anhinga
Preening Anhinga

Anhinga preening while perched on a white mangrove tree.

Anhinga preening while perched on a white mangrove tree.

Image: An Endangered Red Hawksbill Sea Turtle Swims Over a Threatened Elkhorn Coral in Virgin Islands National Park
An Endangered Red Hawksbill Sea Turtle Swims Over a Threatened Elkhorn Coral in Virgin Islands National Park
An Endangered Red Hawksbill Sea Turtle Swims Over a Threatened Elkhorn Coral in Virgin Islands National Park
An Endangered Red Hawksbill Sea Turtle Swims Over a Threatened Elkhorn Coral in Virgin Islands National Park

This photo shows an endangered hawksbill (Eretmochelys imbricata) swimming over a colony of elkhorn coral (Acropora palmata).

USGS scientists are doing research on sea turtles and corals in Florida and the US Virgin Islands.

Image: American Coots (Fulica americana)
American Coots (Fulica americana)
American Coots (Fulica americana)
American Coots (Fulica americana)

American coots at the Merritt Island National Wildlife Refuge. Individuals shown have black feathers, red eyes, and a white bill.

American coots at the Merritt Island National Wildlife Refuge. Individuals shown have black feathers, red eyes, and a white bill.

Image: American Coots (Fulica americana)
American Coots (Fulica americana)
American Coots (Fulica americana)
American Coots (Fulica americana)

American coots at the Merritt Island National Wildlife Refuge. Individuals shown have black feathers, red eyes, and a white bill.

American coots at the Merritt Island National Wildlife Refuge. Individuals shown have black feathers, red eyes, and a white bill.

Image: American Avocets and Egret 1
American Avocets and Egret 1
American Avocets and Egret 1
American Avocets and Egret 1

Formation of American avocets proceeding through shallow water. As they feed, they are accompanied by a wading egret, possibly a Reddish egret.

Formation of American avocets proceeding through shallow water. As they feed, they are accompanied by a wading egret, possibly a Reddish egret.

Image: American Avocets and Egret 2
American Avocets and Egret 2
American Avocets and Egret 2
American Avocets and Egret 2

Formation of American avocets proceeding through shallow water. As they feed, they are accompanied by a wading egret, possibly a Reddish egret.

Formation of American avocets proceeding through shallow water. As they feed, they are accompanied by a wading egret, possibly a Reddish egret.

Image: American Coots (Fulica americana)
American Coots (Fulica americana)
American Coots (Fulica americana)
American Coots (Fulica americana)

American coots at the Merritt Island National Wildlife Refuge. Individuals shown have black feathers, red eyes, and a white bill.

American coots at the Merritt Island National Wildlife Refuge. Individuals shown have black feathers, red eyes, and a white bill.

Image: Mud Volcano
Mud Volcano
Mud Volcano
Mud Volcano

A surface expression of geothermal activity.

A surface expression of geothermal activity.

Image: Mud Volcano
Mud Volcano
Mud Volcano
Mud Volcano

A surface expression of geothermal activity.

A surface expression of geothermal activity.

Image: Mud Volcano
Mud Volcano
Mud Volcano
Mud Volcano

A surface expression of geothermal activity.

A surface expression of geothermal activity.

Image: Wolf in Yellowstone National Park
Wolf in Yellowstone National Park
Wolf in Yellowstone National Park
Wolf in Yellowstone National Park

Wolves were reintroduced to Yellowstone National Park in 1995 and 1996.

Image: Wolf in Yellowstone National Park
Wolf in Yellowstone National Park
Wolf in Yellowstone National Park
Wolf in Yellowstone National Park

Wolves were reintroduced to Yellowstone National Park in 1995 and 1996.

Image: Wolf in Yellowstone National Park
Wolf in Yellowstone National Park
Wolf in Yellowstone National Park
Wolf in Yellowstone National Park

Wolves were reintroduced to Yellowstone National Park in 1995 and 1996.

Image shows a drill rig on a snowy landscape
Gas Hydrate Drill Rig at the Mt. Elbert Test Site in Alaska
Gas Hydrate Drill Rig at the Mt. Elbert Test Site in Alaska
Gas Hydrate Drill Rig at the Mt. Elbert Test Site in Alaska

A drill rig at the Mount Elbert test site in Alaska's North Slope, just west of Prudhoe Bay. USGS joined BP Exploration (Alaska) and the U.S. Department of Energy to drill a test well to study natural gas production from gas hydrate deposits. Read more about the Mt.

A drill rig at the Mount Elbert test site in Alaska's North Slope, just west of Prudhoe Bay. USGS joined BP Exploration (Alaska) and the U.S. Department of Energy to drill a test well to study natural gas production from gas hydrate deposits. Read more about the Mt.

Image: Underwood Waterway Site 3
Underwood Waterway Site 3
Underwood Waterway Site 3
Underwood Waterway Site 3

North Dakota Discovery Farms Underwood waterway site 3, located west of Underwood, ND. In 2008, the Underwood farm became the first farm in the North Dakota Discovery Farms project.

North Dakota Discovery Farms Underwood waterway site 3, located west of Underwood, ND. In 2008, the Underwood farm became the first farm in the North Dakota Discovery Farms project.

Image: Rock Sandpipers Roosting Along Shore of Cook Inlet
Rock Sandpipers Roosting Along Shore of Cook Inlet
Rock Sandpipers Roosting Along Shore of Cook Inlet
Rock Sandpipers Roosting Along Shore of Cook Inlet

A small flock of Rock Sandpipers roosts near the splash zone along the shore of upper Cook Inlet.  Numerous individuals exhibit  ice encasing their lower legs and adhering to their feathers.

A small flock of Rock Sandpipers roosts near the splash zone along the shore of upper Cook Inlet.  Numerous individuals exhibit  ice encasing their lower legs and adhering to their feathers.

Image: Rock Sandpiper with Ice-encrusted Leg
Rock Sandpiper with Ice-encrusted Leg
Rock Sandpiper with Ice-encrusted Leg
Rock Sandpiper with Ice-encrusted Leg

Image of a Rock Sandpiper with its lower left leg encased in ice.

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