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Image: Olivella semistriata - Aperture (Shell Opening) Facing Up
Olivella semistriata - Aperture (Shell Opening) Facing Up
Olivella semistriata - Aperture (Shell Opening) Facing Up
Olivella semistriata - Aperture (Shell Opening) Facing Up

Colorful and coiled seashells of Olivella semistriata with the apertures (shell openings) facing up. Photograph taken 2002 or earlier.

Image: Saguaro National Park, East Unit, Southern Arizona -  ca. 1935
Saguaro National Park, East Unit, Southern Arizona - ca. 1935
Saguaro National Park, East Unit, Southern Arizona - ca. 1935
Saguaro National Park, East Unit, Southern Arizona - ca. 1935

This camera station is located on a hill within the newly established Saguaro National Monument near Tucson. The view is northeast toward Agua Caliente Hill and looks down a gentle incline that drains into Tanque Verde Creek. The saguaro stand pictured here is a particularly memorable one because of the many large individuals and absence of small ones.

This camera station is located on a hill within the newly established Saguaro National Monument near Tucson. The view is northeast toward Agua Caliente Hill and looks down a gentle incline that drains into Tanque Verde Creek. The saguaro stand pictured here is a particularly memorable one because of the many large individuals and absence of small ones.

Image: Cropped Field in Africa
Cropped Field in Africa
Cropped Field in Africa
Cropped Field in Africa

Young boys working in a newly cropped field in Africa.

Image: Whooping Crane Chick L8-10
Whooping Crane Chick L8-10
Whooping Crane Chick L8-10
Whooping Crane Chick L8-10

This adolescent chick, hatched and raised at the USGS Patuxent Wildlife Research Center, is one of ten whooping cranes being released in Louisiana in February 2011. It is a milestone for the state and for the birds, which have not lived in the state since the 1950s.

This adolescent chick, hatched and raised at the USGS Patuxent Wildlife Research Center, is one of ten whooping cranes being released in Louisiana in February 2011. It is a milestone for the state and for the birds, which have not lived in the state since the 1950s.

Image: Copper-Striped Blue-Tailed Skink
Copper-Striped Blue-Tailed Skink
Copper-Striped Blue-Tailed Skink
Copper-Striped Blue-Tailed Skink

A copper-striped blue-tailed skink (Emoia impar) photographed in Samoa during a USGS field survey.

Image: Long Distance Swimmer
Long Distance Swimmer
Long Distance Swimmer
Long Distance Swimmer

Some Polar bears in the Arctic can swim in excess of 200 miles.

 

 

Some Polar bears in the Arctic can swim in excess of 200 miles.

 

 

Image: 2005 Landslide in Conchita, CA
2005 Landslide in Conchita, CA
2005 Landslide in Conchita, CA
2005 Landslide in Conchita, CA

This landslide occurred at La Conchita, California in 2005. Ten people were killed.

Image: Glen Canyon River Outlet Tubes
Glen Canyon River Outlet Tubes
Glen Canyon River Outlet Tubes
Glen Canyon River Outlet Tubes

The outlet tubes of Glen Canyon Dam were opened during the 2004 high-flow experiment on the Colorado River. 

The outlet tubes of Glen Canyon Dam were opened during the 2004 high-flow experiment on the Colorado River. 

Image: Sampling on the Colorado River
Sampling on the Colorado River
Sampling on the Colorado River
Sampling on the Colorado River

Aquatic biologist Tom Sabol of the Grand Canyon Monitoring and Research Center takes samples from the Colorado River.

Aquatic biologist Tom Sabol of the Grand Canyon Monitoring and Research Center takes samples from the Colorado River.

Image: Winter Scenery near Streamgage
Winter Scenery near Streamgage
Winter Scenery near Streamgage
Winter Scenery near Streamgage

A frosty day in North Dakota near the Hear River above Lake Tschida, near Glen Ullin, streamgage.

A frosty day in North Dakota near the Hear River above Lake Tschida, near Glen Ullin, streamgage.

Image: Mallik Gas Hydrate Sample
Mallik Gas Hydrate Sample
Mallik Gas Hydrate Sample
Mallik Gas Hydrate Sample

A sample of gas hydrates collected from Mallik, Canada. Gas hydrates are naturally-occurring “ice-like” combinations of natural gas and water that have the potential to provide an immense resource of natural gas from the world’s oceans and polar regions.

A sample of gas hydrates collected from Mallik, Canada. Gas hydrates are naturally-occurring “ice-like” combinations of natural gas and water that have the potential to provide an immense resource of natural gas from the world’s oceans and polar regions.

Image: Fayetteville Shale Drill Rig
Fayetteville Shale Drill Rig
Fayetteville Shale Drill Rig
Fayetteville Shale Drill Rig

A drill rig in the Fayetteville Shale gas play of Arkansas.

Image: Pacific Herring Larvae
Pacific Herring Larvae
Pacific Herring Larvae
Pacific Herring Larvae

Herring larvae 53 day post-hatch. Black pigmentation is evident.

Herring larvae 53 day post-hatch. Black pigmentation is evident.

Image: Pacific Herring Eggs on Macrophytes
Pacific Herring Eggs on Macrophytes
Pacific Herring Eggs on Macrophytes
Pacific Herring Eggs on Macrophytes

Naturally-deposited herring eggs attached to submerged macrophytes. Coiled embryos are evident inside the eggs.

Naturally-deposited herring eggs attached to submerged macrophytes. Coiled embryos are evident inside the eggs.

Image: Pacific Herring Spawning Event
Pacific Herring Spawning Event
Pacific Herring Spawning Event
Pacific Herring Spawning Event

Small herring spawning event in Puget Sound, evidenced by the presence of 'white water', caused by mass release of spawning products into the water.

Small herring spawning event in Puget Sound, evidenced by the presence of 'white water', caused by mass release of spawning products into the water.

Image: Juvenile Bighead Carp
Juvenile Bighead Carp
Juvenile Bighead Carp
Juvenile Bighead Carp

These juvenile bighead carps are used to find potential physical, biological or chemical controls as part of an integrated pest management approach for natural resource managers.

Asian carp are invasive species that could pose substantial environmental risks and economic impacts if they become established.

These juvenile bighead carps are used to find potential physical, biological or chemical controls as part of an integrated pest management approach for natural resource managers.

Asian carp are invasive species that could pose substantial environmental risks and economic impacts if they become established.

Image: Live Asian Swamp Eels Sold in a U.S. Market
Live Asian Swamp Eels Sold in a U.S. Market
Live Asian Swamp Eels Sold in a U.S. Market
Live Asian Swamp Eels Sold in a U.S. Market

These live Asian swamp eels were imported from southeast Asia and sold in an urban food market in the U.S. Raw or undercooked Asian swamp eels could transmit a parasitic infection called gnathostomiasis to consumers, and wild eels could become widespread in some U.S. waters.

These live Asian swamp eels were imported from southeast Asia and sold in an urban food market in the U.S. Raw or undercooked Asian swamp eels could transmit a parasitic infection called gnathostomiasis to consumers, and wild eels could become widespread in some U.S. waters.

Image: Olivella semistriata Orange
Olivella semistriata Orange
Olivella semistriata Orange
Olivella semistriata Orange

The orange, coiled seashell of Olivella semistriata with the aperture (shell opening) facing up. Photograph taken 2002 or earlier.

The orange, coiled seashell of Olivella semistriata with the aperture (shell opening) facing up. Photograph taken 2002 or earlier.

Image: Young Freshwater Mussels as seen Through a Microscope
Young Freshwater Mussels as seen Through a Microscope
Young Freshwater Mussels as seen Through a Microscope
Young Freshwater Mussels as seen Through a Microscope

During laboratory tests, USGS Upper Midwest Environmental Sciences Center scientists and partners found that the heart and growth rates of some species of young freshwater mussels declined as a result of elevated water temperatures, and many died.

During laboratory tests, USGS Upper Midwest Environmental Sciences Center scientists and partners found that the heart and growth rates of some species of young freshwater mussels declined as a result of elevated water temperatures, and many died.

Image: Footprints in Ash from 1790 Kilauea Volcano Eruption
Footprints in Ash from 1790 Kilauea Volcano Eruption
Footprints in Ash from 1790 Kilauea Volcano Eruption
Footprints in Ash from 1790 Kilauea Volcano Eruption

Footprints made in muddy ash during Kilauea's 1790 eruption are reminders that people experienced the largest explosive eruption in Hawai‘i in 1,000 years. More than 80, and possibly several hundred, people were killed by the eruption soon after the footprints were made.

Footprints made in muddy ash during Kilauea's 1790 eruption are reminders that people experienced the largest explosive eruption in Hawai‘i in 1,000 years. More than 80, and possibly several hundred, people were killed by the eruption soon after the footprints were made.

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