Unuk River waterfalls from old lava pipes. Volcanic lava pipes form as the result of violent eruptions of deep-origin volcanoes. The Unuk River is one of the transboundary watersheds of Southeast Alaska.
Images
Browse images from a wide range of science topics covered by USGS. All items in this gallery are considered public domain unless otherwise noted.
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Unuk River waterfalls from old lava pipes
Unuk River waterfalls from old lava pipes. Volcanic lava pipes form as the result of violent eruptions of deep-origin volcanoes. The Unuk River is one of the transboundary watersheds of Southeast Alaska.
Pelagic cormorant, Gull Island, Kachemak Bay Alaska
Pelagic cormorant, sitting on a cliff on Gull Island, which is located at Kachemak Bay, Alaska.
Pelagic cormorant, sitting on a cliff on Gull Island, which is located at Kachemak Bay, Alaska.
Thick-billed Murres on the Pribilof Islands
Three thick-billed Murres perched on the Pribilof Islands, off the coast of the mainland, Alaska.
Three thick-billed Murres perched on the Pribilof Islands, off the coast of the mainland, Alaska.
Ablation stakes on Gulkana Glacier
Ablation stakes on Gulkana Glacier, Alaska. Late summer fieldwork on Gulkana Glacier reveals ablation stakes emerging from the ice. Measurements of the change in the height of the snow and ice at these stakes is one aspect of determining glacier mass balance.
Ablation stakes on Gulkana Glacier, Alaska. Late summer fieldwork on Gulkana Glacier reveals ablation stakes emerging from the ice. Measurements of the change in the height of the snow and ice at these stakes is one aspect of determining glacier mass balance.
Common Murre with a Northern Ronquil
A Common Murre holds a Northern Ronquil in its bill. Photo taken at Gull Island in Kachemak Bay, Alaska.
A Common Murre holds a Northern Ronquil in its bill. Photo taken at Gull Island in Kachemak Bay, Alaska.
Fairweather Range, Alaska
Fairweather Range, Alaska. The mountain range spans across Alaska and the Canadian province of British Columbia. Photo taken while flying over range.
Fairweather Range, Alaska. The mountain range spans across Alaska and the Canadian province of British Columbia. Photo taken while flying over range.
Variation of weathering on rock surface
Variation of weathering and lichen growth on the rock surface reveals veins and segregated zones with different mineralogy.
Variation of weathering and lichen growth on the rock surface reveals veins and segregated zones with different mineralogy.
Scientists record nearshore transects in Kachemak Bay, Alaska
Brian Robinson (USGS) and Ben Weitzman (NOAA) record observations along nearshore transects in Kachemak Bay, Alaska. USGS is studying the migration strategies and movement ecology of Black Oystercatchers as part of the new tracking study.
Brian Robinson (USGS) and Ben Weitzman (NOAA) record observations along nearshore transects in Kachemak Bay, Alaska. USGS is studying the migration strategies and movement ecology of Black Oystercatchers as part of the new tracking study.
Caitlin Marsteller prepares to release a Black Oystercatcher, Alaska
USGS Biologist Caitlin Marsteller prepares to release a Black Oystercatcher after assisting with the collection of morphometric data and tagging. Data were collected from Black Oystercatchers as part of a new study to better understand migration strategies and movement ecology of the species.
USGS Biologist Caitlin Marsteller prepares to release a Black Oystercatcher after assisting with the collection of morphometric data and tagging. Data were collected from Black Oystercatchers as part of a new study to better understand migration strategies and movement ecology of the species.
Caitlin Marsteller releases a Black Oystercatcher on beach in Alaska
USGS Biologist Caitlin Marsteller releases a Black Oystercatcher after assisting with the collection of morphometric data and tagging. Data were collected from Black Oystercatchers as part of a new study to better understand migration strategies and movement ecology of the species.
USGS Biologist Caitlin Marsteller releases a Black Oystercatcher after assisting with the collection of morphometric data and tagging. Data were collected from Black Oystercatchers as part of a new study to better understand migration strategies and movement ecology of the species.
Walruses resting on an ice floe
A group of Pacific walruses during summer in the Chukchi Sea
A group of Pacific walruses during summer in the Chukchi Sea
Glaucous-winged gull with externally attached GPS satellite transmitte
Glaucous-winged gull with externally attached GPS satellite transmitter, Soldotna, Alaska
Glaucous-winged gull with externally attached GPS satellite transmitter, Soldotna, Alaska
Upstream view of the Middle Fork Fortymile River, Alaska
Upstream view of the Middle Fork Fortymile River near U.S. Geological Survey streamgage 15331000, Middle Fork Fortymile River near mouth near Chicken, Alaska
Upstream view of the Middle Fork Fortymile River near U.S. Geological Survey streamgage 15331000, Middle Fork Fortymile River near mouth near Chicken, Alaska
Barry Arm of Harriman Fjord, Prince William Sound, Alaska
Barry Arm of Harriman Fjord, Prince William Sound, Alaska. Included is Barry Glacier and Cascade Glacier.
Barry Arm of Harriman Fjord, Prince William Sound, Alaska. Included is Barry Glacier and Cascade Glacier.
Maps displaying the spatial-temporal variability in the NPPSD 3.0 data
Maps displaying the spatial-temporal variability in the NPPSD 3.0 dataset
Maps displaying the spatial-temporal variability in the NPPSD 3.0 dataset
Juvenile gull flying over water
This is a photo of a juvenile gull flying over water in the Aleutian Islands, Alaska.
This is a photo of a juvenile gull flying over water in the Aleutian Islands, Alaska.
Figure 1 map of marine bird surveys at sea for NPPSD
Fig 1 map showing total sampling effort (strip transects) of marine bird surveys at sea in the North Pacific Pelagic Seabird Database (NPPSD).
Fig 1 map showing total sampling effort (strip transects) of marine bird surveys at sea in the North Pacific Pelagic Seabird Database (NPPSD).
Aerial survey for Black Brant at Izembek Lagoon, Alaska
Example of a photo from the USFWS fall aerial survey for geese at Izembek Lagoon. Inset shows a closer view of four Black Brant (bottom) with a Cackling Goose (top) foraging on eelgrass. Scientists from the USGS Alaska Science Center and the U.S.
Example of a photo from the USFWS fall aerial survey for geese at Izembek Lagoon. Inset shows a closer view of four Black Brant (bottom) with a Cackling Goose (top) foraging on eelgrass. Scientists from the USGS Alaska Science Center and the U.S.
Semipalmated Sandpipers with leg bands or leg bands plus flag
Semipalmated Sandpipers with A) Leg bands only (no flag), or B) leg bands plus flag From: Leg flags do not affect shorebird nests: https://doi.org/10.1111/jofo.12264
Semipalmated Sandpipers with A) Leg bands only (no flag), or B) leg bands plus flag From: Leg flags do not affect shorebird nests: https://doi.org/10.1111/jofo.12264
A young sea otter foraging for invertebrates
A young sea otter foraging for small invertebrates off an emergent rock covered with seaweed, snails, and barnacles. Photo taken in Prince William Sound, Alaska.
A young sea otter foraging for small invertebrates off an emergent rock covered with seaweed, snails, and barnacles. Photo taken in Prince William Sound, Alaska.
A sea otter mom nursing her pup
A sea otter mom nursing her pup. Photo taken in Prince William Sound, Alaska. A new born sea otter needs to stay with its mother for six months to learn how to survive on its own.
A sea otter mom nursing her pup. Photo taken in Prince William Sound, Alaska. A new born sea otter needs to stay with its mother for six months to learn how to survive on its own.