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Image: Sumatran Tiger
Sumatran Tiger
Sumatran Tiger
Sumatran Tiger

The sumatran tiger (Panthera tigris sumatrae) makes an appearance at the Save Vanishing Species event to unveil the tiger stamp for the First-Day-Of-Issue Ceremony at the Smithsonian National Zoology Park.

The sumatran tiger (Panthera tigris sumatrae) makes an appearance at the Save Vanishing Species event to unveil the tiger stamp for the First-Day-Of-Issue Ceremony at the Smithsonian National Zoology Park.

Image: Conifers and Mountains in Western Canada
Conifers and Mountains in Western Canada
Conifers and Mountains in Western Canada
Conifers and Mountains in Western Canada

An extensive coniferous forest of pines, spruces, and larches in the Canadian Rockies.

Image: Black-Footed Ferret
Black-Footed Ferret
Black-Footed Ferret
Black-Footed Ferret

The USGS National Wildlife Health Center is working to develop an oral vaccine to protect the endangered black-footed ferret from plague.

The USGS National Wildlife Health Center is working to develop an oral vaccine to protect the endangered black-footed ferret from plague.

Image: USCGC Healy Working at Close Quarters with CCGS Louis S. St-Laurent
USCGC Healy Working at Close Quarters with CCGS Louis S. St-Laurent
USCGC Healy Working at Close Quarters with CCGS Louis S. St-Laurent
USCGC Healy Working at Close Quarters with CCGS Louis S. St-Laurent

It is very unusual for large (400 ft) vessels to be so close together during normal science operations.  In this case, the skilled ship handling of the Captain from USCGC Healy enabled Healy to back within ~75 ft of Louis to clear ice around the bow of Louis, thereby releasing pressure and allowing her to move again.

It is very unusual for large (400 ft) vessels to be so close together during normal science operations.  In this case, the skilled ship handling of the Captain from USCGC Healy enabled Healy to back within ~75 ft of Louis to clear ice around the bow of Louis, thereby releasing pressure and allowing her to move again.

USGS scientists J. Alton Anderson and Dennis W. Risser prepare to collect a full-waveform sonic log from a 1,000-foot deep strat
USGS scientists prepare to collect a full-waveform sonic log
USGS scientists prepare to collect a full-waveform sonic log
USGS scientists prepare to collect a full-waveform sonic log

USGS scientists J. Alton Anderson and Dennis W. Risser prepare to collect a full-waveform sonic log from a 1,000-foot deep stratigraphic test hole drilled by the Pennsylvania Geological Survey at the edge of a Marcellus Shale production well pad in Lycoming County, PA.

USGS scientists J. Alton Anderson and Dennis W. Risser prepare to collect a full-waveform sonic log from a 1,000-foot deep stratigraphic test hole drilled by the Pennsylvania Geological Survey at the edge of a Marcellus Shale production well pad in Lycoming County, PA.

Image: CTD rosette used on Coast Guard ice breaker in Canadian Basin
CTD rosette used on Coast Guard ice breaker in Canadian Basin
CTD rosette used on Coast Guard ice breaker in Canadian Basin
CTD rosette used on Coast Guard ice breaker in Canadian Basin

Water samples using a CTD rosette were taken down to  4,600m in the Canadian Basin in order to investigate ocean acidification.  The water was analyzed shipboard for pH using a spectrophotometer.

Water samples using a CTD rosette were taken down to  4,600m in the Canadian Basin in order to investigate ocean acidification.  The water was analyzed shipboard for pH using a spectrophotometer.

Image: Algal Blooms
Algal Blooms
Algal Blooms
Algal Blooms

USGS Hydrologist, Guy Foster collects a sample of blue-green algae in Milford Lake, Kansas.

USGS Hydrologist, Guy Foster collects a sample of blue-green algae in Milford Lake, Kansas.

Image: Scientists Release Altantic Salmon into Beaverdam Brook
Scientists Release Altantic Salmon into Beaverdam Brook
Scientists Release Altantic Salmon into Beaverdam Brook
Scientists Release Altantic Salmon into Beaverdam Brook

USGS Tunison Lab scientist Emily Waldt (right) assists Dan Bishop of the New York State Department of Environmental Conservation in releasing Atlantic salmon into Beaverdam Brook at the state's Salmon River Fish Hatchery.

USGS Tunison Lab scientist Emily Waldt (right) assists Dan Bishop of the New York State Department of Environmental Conservation in releasing Atlantic salmon into Beaverdam Brook at the state's Salmon River Fish Hatchery.

Image: USGS Scientists Prepare to Release Salmon into Beaverdam Brook
USGS Scientists Prepare to Release Salmon into Beaverdam Brook
USGS Scientists Prepare to Release Salmon into Beaverdam Brook
USGS Scientists Prepare to Release Salmon into Beaverdam Brook

USGS scientist Ross Abbett transfers young Atlantic salmon from their transportation tank on the back of a truck to small buckets for release into Beaverdam Brook in Altmar, N.Y.

USGS scientist Ross Abbett transfers young Atlantic salmon from their transportation tank on the back of a truck to small buckets for release into Beaverdam Brook in Altmar, N.Y.

Image: Salmon River Fish Hatchery in Altmar, N.Y.
Salmon River Fish Hatchery in Altmar, N.Y.
Salmon River Fish Hatchery in Altmar, N.Y.
Salmon River Fish Hatchery in Altmar, N.Y.

USGS scientists release young Atlantic salmon into Lake Ontario tributaries near the New York State Department of Environmental Conservation's Salmon River Fish Hatchery in Altmar, N.Y.

USGS scientists release young Atlantic salmon into Lake Ontario tributaries near the New York State Department of Environmental Conservation's Salmon River Fish Hatchery in Altmar, N.Y.

Image: New York State Salmon River Fish Hatchery
New York State Salmon River Fish Hatchery
New York State Salmon River Fish Hatchery
New York State Salmon River Fish Hatchery

USGS scientists release young Atlantic salmon into Lake Ontario tributaries near the New York State Department of Environmental Conservation's Salmon River Fish Hatchery in Altmar, N.Y.

USGS scientists release young Atlantic salmon into Lake Ontario tributaries near the New York State Department of Environmental Conservation's Salmon River Fish Hatchery in Altmar, N.Y.

Image: Salmon River Fish Hatchery: Home Base for Released Salmon
Salmon River Fish Hatchery: Home Base for Released Salmon
Salmon River Fish Hatchery: Home Base for Released Salmon
Salmon River Fish Hatchery: Home Base for Released Salmon

Salmon that have been reared and released at the NY State Salmon River Fish Hatchery imprint on the Hatchery waters, often returning to visit the Hatchery after they are released.

Salmon that have been reared and released at the NY State Salmon River Fish Hatchery imprint on the Hatchery waters, often returning to visit the Hatchery after they are released.

Image: Salmon Are Carefully Released Using Buckets
Salmon Are Carefully Released Using Buckets
Salmon Are Carefully Released Using Buckets
Salmon Are Carefully Released Using Buckets

Thousands of young Atlantic salmon are being released into Salmon River in an effort to restore this diminished Lake Ontario fish population, extending the sport fishing season by at least two months in Oswego County, N.Y.

Thousands of young Atlantic salmon are being released into Salmon River in an effort to restore this diminished Lake Ontario fish population, extending the sport fishing season by at least two months in Oswego County, N.Y.

Image: Young Atlantic Salmon Reared at the USGS Tunison Lab in Cortland, N.Y.
Young Atlantic Salmon Reared at the USGS Tunison Lab in Cortland, N.Y.
Young Atlantic Salmon Reared at the USGS Tunison Lab in Cortland, N.Y.
Young Atlantic Salmon Reared at the USGS Tunison Lab in Cortland, N.Y.

Thousands of young Atlantic salmon are being released into Salmon River in an effort to restore this diminished Lake Ontario fish population, extending the sport fishing season by at least two months in Oswego County, N.Y.

Thousands of young Atlantic salmon are being released into Salmon River in an effort to restore this diminished Lake Ontario fish population, extending the sport fishing season by at least two months in Oswego County, N.Y.

Image: Atlantic Salmon Released into Beaverdam Brook
Atlantic Salmon Released into Beaverdam Brook
Atlantic Salmon Released into Beaverdam Brook
Atlantic Salmon Released into Beaverdam Brook

USGS employee Marisa Lubeck releases the day's last young Atlantic salmon into Beaverdam Brook in Altmar, N.Y.

Thousands of young Atlantic salmon are being released into Salmon River in an effort to restore this diminished Lake Ontario fish population, extending the sport fishing season by at least two months in Oswego County, N.Y.

USGS employee Marisa Lubeck releases the day's last young Atlantic salmon into Beaverdam Brook in Altmar, N.Y.

Thousands of young Atlantic salmon are being released into Salmon River in an effort to restore this diminished Lake Ontario fish population, extending the sport fishing season by at least two months in Oswego County, N.Y.

Image: Salmon River Fish Hatchery: Home Base for Released Salmon
Salmon River Fish Hatchery: Home Base for Released Salmon
Salmon River Fish Hatchery: Home Base for Released Salmon
Salmon River Fish Hatchery: Home Base for Released Salmon

Salmon that have been reared and released at the NY State Salmon River Fish Hatchery imprint on the Hatchery waters, often returning to visit the Hatchery after they are released.

Salmon that have been reared and released at the NY State Salmon River Fish Hatchery imprint on the Hatchery waters, often returning to visit the Hatchery after they are released.

Image: Scientists Release Altantic Salmon into Beaverdam Brook
Scientists Release Altantic Salmon into Beaverdam Brook
Scientists Release Altantic Salmon into Beaverdam Brook
Scientists Release Altantic Salmon into Beaverdam Brook

USGS Tunison Lab scientists Rich Chiavelli (left) and Emily Waldt (middle) hand a bucketful of young Atlantic salmon to Dan Bishop (right) of the New York State Department of Environmental Conservation for release into Beaverdam Brook at the state's Salmon River Fish Hatchery.

USGS Tunison Lab scientists Rich Chiavelli (left) and Emily Waldt (middle) hand a bucketful of young Atlantic salmon to Dan Bishop (right) of the New York State Department of Environmental Conservation for release into Beaverdam Brook at the state's Salmon River Fish Hatchery.

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