Radio-collared female Carolina Northern Flying Squirrel (Glaucomys sabrinus coloratus) in a high elevation red spruce (Picea rubens) stand on Whitetop Mountain, VA during winter of 2014.
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Carolina Northern Flying Squirrel
Radio-collared female Carolina Northern Flying Squirrel (Glaucomys sabrinus coloratus) in a high elevation red spruce (Picea rubens) stand on Whitetop Mountain, VA during winter of 2014.
Sanderling (Calidris alba)
Sanderling (Calidris alba) walking on sand, seen during field work in Iceland in 2014.
Sanderling (Calidris alba) walking on sand, seen during field work in Iceland in 2014.
Suspended sediment sampling bottles from Elwha River sampling
Series of daily sample bottles containing integrated water samples from the Elwha River, October 17, 2012 to November 9, 2012.
Series of daily sample bottles containing integrated water samples from the Elwha River, October 17, 2012 to November 9, 2012.
Suspended sediment sampling series
Series of daily sample bottles containing integrated water samples from the Elwha River, October 17, 2012 to November 9, 2012. Graphical overlay is the measured suspended sediment concentration in each sample bottle, showing the variability in sediment concentration during the time period shown.
Series of daily sample bottles containing integrated water samples from the Elwha River, October 17, 2012 to November 9, 2012. Graphical overlay is the measured suspended sediment concentration in each sample bottle, showing the variability in sediment concentration during the time period shown.
Wading birds feed at a study site in a Louisiana coastal salt marsh
To understand how changes in rainfall and temperature might affect coastal wetlands in the northern Gulf of Mexico, USGS researchers conducted field studies at 10 estuaries in five states (Texas, Louisiana, Mississippi, Alabama, and Florida). The fieldwork took place in a variety of coastal wetland types, including mangroves, marshes, and salt flats.
To understand how changes in rainfall and temperature might affect coastal wetlands in the northern Gulf of Mexico, USGS researchers conducted field studies at 10 estuaries in five states (Texas, Louisiana, Mississippi, Alabama, and Florida). The fieldwork took place in a variety of coastal wetland types, including mangroves, marshes, and salt flats.
Cackling goose (Branta hutchinsii) on the Colville River Delta
Cackling goose (Branta hutchinsii) on the Colville River Delta. Photo by Ryan Askren, USGS.
Cackling goose (Branta hutchinsii) on the Colville River Delta. Photo by Ryan Askren, USGS.
Common Eider pair
Common Eider pair in the water
Glen Canyon Dam jet tubes releasing water for a high flow experiment
Glen Canyon Dam jet tubes releasing water into the Colorado River for a high flow experiment. The increase in flow of the Colorado River downstream of the dam mobilizes sand at the bottom of the river and that sand rebuilds sandbars in Grand Canyon.
Glen Canyon Dam jet tubes releasing water into the Colorado River for a high flow experiment. The increase in flow of the Colorado River downstream of the dam mobilizes sand at the bottom of the river and that sand rebuilds sandbars in Grand Canyon.
Graduate student kayaking at Glacier National Park researching bull trout
This project is designed to assess the feasibility of "rescuing" specific genetic lineages of bull trout from likely extirpation in three imperiled major lake drainages in GNP, through translocation of drainage-specific stocks into lakes located above barrier falls within parental drainages.
This project is designed to assess the feasibility of "rescuing" specific genetic lineages of bull trout from likely extirpation in three imperiled major lake drainages in GNP, through translocation of drainage-specific stocks into lakes located above barrier falls within parental drainages.
Mouth of the Elwha River during dam removal
Aerial photograph of the mouth of the Elwha River where it meets the Strait of Juan de Fuca during the removal of the Elwha and Glines Canyon dams, Washington State, USA. Aerial assistance by LightHawk and plane piloted by Dr. Hunter Handsfield.
Aerial photograph of the mouth of the Elwha River where it meets the Strait of Juan de Fuca during the removal of the Elwha and Glines Canyon dams, Washington State, USA. Aerial assistance by LightHawk and plane piloted by Dr. Hunter Handsfield.
Elwha River flowing through former Aldwell Reservoir
Aerial photograph of the former Lake Aldwell reservoir and the Elwha River 16 months following the removal of the Elwha Dam, Washington State, USA. Aerial assistance by LightHawk and plane piloted by Dr. Hunter Handsfield.
Aerial photograph of the former Lake Aldwell reservoir and the Elwha River 16 months following the removal of the Elwha Dam, Washington State, USA. Aerial assistance by LightHawk and plane piloted by Dr. Hunter Handsfield.
Former Mills reservoir during dam removal on the Elwha River
Aerial photograph of the former Lake Aldwell reservoir and the Elwha River 16 months following the removal of the Elwha Dam, Washington State, USA. Aerial assistance by LightHawk and plane piloted by Dr. Hunter Handsfield.
Aerial photograph of the former Lake Aldwell reservoir and the Elwha River 16 months following the removal of the Elwha Dam, Washington State, USA. Aerial assistance by LightHawk and plane piloted by Dr. Hunter Handsfield.
Mouth of the Elwha
Aerial photograph showing the mouth of the Elwha River, Washington State, USA. Aerial assistance by LightHawk and plane piloted by Dr. Hunter Handsfield.
Aerial photograph showing the mouth of the Elwha River, Washington State, USA. Aerial assistance by LightHawk and plane piloted by Dr. Hunter Handsfield.
Forage sampling
Lindsay VanSomeren (graduate student at University of Alaska Fairbanks) collects forage samples in the foothills of the Brooks Range off the Dalton Highway, North Slope of Alaska.
Lindsay VanSomeren (graduate student at University of Alaska Fairbanks) collects forage samples in the foothills of the Brooks Range off the Dalton Highway, North Slope of Alaska.
Walruses are very social
Walruses are very social animals and like to be in constant contact with other walruses. Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-3
Walruses are very social animals and like to be in constant contact with other walruses. Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-3
Female Walrus Resting Beside a Yearling Walrus
The coastal walrus haulouts that form during periods of sea ice scarcity in the Chukchi Sea are composed primarily of adult female walruses and young, as well as some adult male walruses.
(Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-3)
The coastal walrus haulouts that form during periods of sea ice scarcity in the Chukchi Sea are composed primarily of adult female walruses and young, as well as some adult male walruses.
(Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-3)
Adult Walrus Resting on Shore
A close up of a female walrus resting after entering the haulout. Sand from the beach is evident on her tusks.
(Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-3)
A close up of a female walrus resting after entering the haulout. Sand from the beach is evident on her tusks.
(Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-3)
Tagging Walruses
A transmitter tag (left) is being deployed by a USGS Wildlife Biologist (far right).
A transmitter tag (left) is being deployed by a USGS Wildlife Biologist (far right).
Female and Young Walruses Resting on Shore
Thousands of walruses gathered to rest on the shore near the Alaskan coastal community of Point Lay during September of 2013 after sea ice disappeared from their offshore foraging grounds in the eastern Chukchi Sea.
(Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-3)
Thousands of walruses gathered to rest on the shore near the Alaskan coastal community of Point Lay during September of 2013 after sea ice disappeared from their offshore foraging grounds in the eastern Chukchi Sea.
(Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-3)
Female and Young Walruses Resting on Shore
Thousands of walruses gathered to rest on the shore near the Alaskan coastal community of Point Lay during September of 2013 after sea ice disappeared from their offshore foraging grounds in the eastern Chukchi Sea.
(Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-3)
Thousands of walruses gathered to rest on the shore near the Alaskan coastal community of Point Lay during September of 2013 after sea ice disappeared from their offshore foraging grounds in the eastern Chukchi Sea.
(Photo taken during USGS research efforts permitted under US Fish and Wildlife Service Permit No. MA801652-3)