Snakehead fish are originally from China and Korea, but recently they've been found in Maryland, Virginia, Arkansas, California, and Florida.
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Snakehead Fish
Snakehead fish are originally from China and Korea, but recently they've been found in Maryland, Virginia, Arkansas, California, and Florida.
Methane Seeps along Offshore Virginia
Numerous distinct methane streams emanating from the seafloor at an upper slope (< 500 m water depth) cold seep site offshore Virginia. Image courtesy of NOAA Okeanos Explorer Program, 2013 Northeast U.S. Canyons Expedition.
Numerous distinct methane streams emanating from the seafloor at an upper slope (< 500 m water depth) cold seep site offshore Virginia. Image courtesy of NOAA Okeanos Explorer Program, 2013 Northeast U.S. Canyons Expedition.
Ahankashan Copper Gold
Aerial view looking into the center of the dome-shaped pluton.
Aerial view looking into the center of the dome-shaped pluton.
Bark Scorpion (Centruroides sp.)
Black scorpion (Centruroides sp.) held in a person's hand.
Black scorpion (Centruroides sp.) held in a person's hand.
Engraved Copper Map Plate
The USGS is offering surplus engraved copper plates for sale through government auction.
The USGS is offering surplus engraved copper plates for sale through government auction.
Collecting Gas Sample at a Fumarole
USGS geologist Deborah Bergfeld collects a gas sample from a superheated (hotter than the boiling point) fumarole in Little Hot Springs Valley at Lassen Volcanic National Park.
USGS geologist Deborah Bergfeld collects a gas sample from a superheated (hotter than the boiling point) fumarole in Little Hot Springs Valley at Lassen Volcanic National Park.
USGS Avian Flu Research
A biological technician of the USGS National Wildlife Health Center tests chicken eggs inoculated with a field sample from wild birds to detect the presence of avian influenza virus.
A biological technician of the USGS National Wildlife Health Center tests chicken eggs inoculated with a field sample from wild birds to detect the presence of avian influenza virus.
Scientists Collect Data on Yosemite Rock Erosion
Yosemite National Park geologist Greg Stock and USGS civil engineer Brian Collins download data from instruments measuring how much granitic exfoliation sheets move from daily temperature variations as a precursor to rock fall.
Yosemite National Park geologist Greg Stock and USGS civil engineer Brian Collins download data from instruments measuring how much granitic exfoliation sheets move from daily temperature variations as a precursor to rock fall.
Meadow Vole
Meadow vole rests in its habitat.
Meadow vole rests in its habitat.
Radiolarians (10 Species)
A photomicrograph depicting the siliceous tests of ten species of marine radiolarians. Upon death, their tests can form siliceous marine sediments known as radiolarian ooze.
A photomicrograph depicting the siliceous tests of ten species of marine radiolarians. Upon death, their tests can form siliceous marine sediments known as radiolarian ooze.
Deforestation
Forest cover being removed for cattle pasturage and development. Bulldozer and smoke from bulldozed trees in the background with cattle in the foreground.
Forest cover being removed for cattle pasturage and development. Bulldozer and smoke from bulldozed trees in the background with cattle in the foreground.
Field Work on Mount Rainier
Researcher Amanda Kissel pauses by a lake in Mt. Rainier National Park.
Researcher Amanda Kissel pauses by a lake in Mt. Rainier National Park.
Maureen Ryan with Chuckler
Reseracher Maureen Ryan poses by a pond holding one of her study species, a cascades frog.
Reseracher Maureen Ryan poses by a pond holding one of her study species, a cascades frog.
Deforestation
Forest cover being removed for cattle pasturage and development. Smoke from bulldozed trees is visible in background with cattle in the foreground.
Forest cover being removed for cattle pasturage and development. Smoke from bulldozed trees is visible in background with cattle in the foreground.
Soper Branch Creek
Soper Branch stream with a USGS streamgage on the bridge. Soper Branch is a small stream near Hyattstown, MD, that is part of the Chesapeake Bay watershed.
Soper Branch stream with a USGS streamgage on the bridge. Soper Branch is a small stream near Hyattstown, MD, that is part of the Chesapeake Bay watershed.
Cladophora Algae
The USGS studies what lives in Cladophora glomerata algae and why it matters for fish, wildlife, and, ultimately, the people that rely on the Great Lakes fisheries.
The USGS studies what lives in Cladophora glomerata algae and why it matters for fish, wildlife, and, ultimately, the people that rely on the Great Lakes fisheries.
Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable
Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a CableA low-level helicopter towing a large wire-loop contraption hanging from a cable is flying straight across an open field in Nebraska on a clear day.
Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a Cable
Low-level Helicopter Towing a Large Wire-Loop Contraption Hanging from a CableA low-level helicopter towing a large wire-loop contraption hanging from a cable is flying straight across an open field in Nebraska on a clear day.
Truffle
A truffle of Elaphomyces spp. with Elaphocordyceps ophioglossoides, a parasitic ascomycetous fungus, at Kumbrabow State Forest in West Virginia.
A truffle of Elaphomyces spp. with Elaphocordyceps ophioglossoides, a parasitic ascomycetous fungus, at Kumbrabow State Forest in West Virginia.
Air-quality Monitoring Instruments
Annotated photo of air-quality particulate monitoring instruments, showing temperature and humidity sensors, air-sample inlet tube, wind sensor, power supply, and communication connections.
Annotated photo of air-quality particulate monitoring instruments, showing temperature and humidity sensors, air-sample inlet tube, wind sensor, power supply, and communication connections.
Juvenile Silver Carp
This close-up image is of juvenile silver carp in research tanks at the USGS Upper Midwest Environmental Sciences Center.
This close-up image is of juvenile silver carp in research tanks at the USGS Upper Midwest Environmental Sciences Center.
Copper Map Plate Detail
Detail of a “culture” separate, which was represented in the color black on a USGS topographic map.
Detail of a “culture” separate, which was represented in the color black on a USGS topographic map.