Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Browse images from a wide range of science topics covered by USGS.
A stream type at the Boreal-Arctic transition of the Brooks Range, Noatak National Park and Preserve, Kobuk Valley National Park. The stream is part of the Agashashok River watershed. This is part of the Hydro-Ecoloy of Arctic Thawing (HEAT) project.
A stream type at the Boreal-Arctic transition of the Brooks Range, Noatak National Park and Preserve, Kobuk Valley National Park. The stream is part of the Agashashok River watershed. This is part of the Hydro-Ecoloy of Arctic Thawing (HEAT) project.
A stream type at the Boreal-Arctic transition of the Brooks Range, Noatak National Park and Preserve, Kobuk Valley National Park. This stream is in the Agashashok River watershed. This is part of the Hydro-Ecoloy of Arctic Thawing (HEAT) project.
A stream type at the Boreal-Arctic transition of the Brooks Range, Noatak National Park and Preserve, Kobuk Valley National Park. This stream is in the Agashashok River watershed. This is part of the Hydro-Ecoloy of Arctic Thawing (HEAT) project.
Chris Zimmerman sampling a stream in the drainage of the Agashashok River which is in the Boreal-Arctic transition of the Brooks Range in Noatak National Park and Preserve, Kobuk Valley National Park. This is part of the Hydro-Ecoloy of Arctic Thawing (HEAT) project.
Chris Zimmerman sampling a stream in the drainage of the Agashashok River which is in the Boreal-Arctic transition of the Brooks Range in Noatak National Park and Preserve, Kobuk Valley National Park. This is part of the Hydro-Ecoloy of Arctic Thawing (HEAT) project.
Montana River bridge
Three researchers from the University of Waterloo hunt for aquatic insects among the detritus scooped from the lake’s nearshore zone.
Three researchers from the University of Waterloo hunt for aquatic insects among the detritus scooped from the lake’s nearshore zone.
Contents of the fyke net that was set in the lake near Atqasuk in 2016. All sticklebacks.
Contents of the fyke net that was set in the lake near Atqasuk in 2016. All sticklebacks.
A flock of Black-legged Kittiwakes foraging on Pacific sand lance near Gull Island.
A flock of Black-legged Kittiwakes foraging on Pacific sand lance near Gull Island.
Common Murres stand at the edge of their colony on Gull Island, Cook Inlet on July 23, 2016.
Common Murres stand at the edge of their colony on Gull Island, Cook Inlet on July 23, 2016.
Large amount of Common Murres in the water
Large amount of Common Murres in the water
Eklutna River traveling under two bridges
Eklutna River traveling under two bridges
Male Lapland Longspur in dwarf shrub mat habitat. This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.
Male Lapland Longspur in dwarf shrub mat habitat. This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.
Catch of forage fish from a trawl in Cook Inlet, Alaska. Trawling was part of an assessment of abundance, distribution and species composition of forage fish in marine waters in lower Cook Inlet.
Catch of forage fish from a trawl in Cook Inlet, Alaska. Trawling was part of an assessment of abundance, distribution and species composition of forage fish in marine waters in lower Cook Inlet.
A Horned Puffin flying
Molybdenite mineral coating on a fractured surface in Tertiary granite north of Lake Clark
Molybdenite mineral coating on a fractured surface in Tertiary granite north of Lake Clark
Copper River bridge
Horned Puffin, one of the species affected by a recent seabird die-off in the Pribilof Islands, AK. Near Chisik Island in Lower Cook Inlet, Alaska
Horned Puffin, one of the species affected by a recent seabird die-off in the Pribilof Islands, AK. Near Chisik Island in Lower Cook Inlet, Alaska
A Horned Puffin flying over the water
A Horned Puffin flying over the water
Jamey Jones collects a sample of Talkeenta Formation volcaniclastic sandstone for detrital zircon geochronology.
Jamey Jones collects a sample of Talkeenta Formation volcaniclastic sandstone for detrital zircon geochronology.
USGS research geologists Jamey Jones (left) and Erin Todd (right) discuss the "big picture" geology in their project area in and around Lake Clark National Park. Redoubt volcano in background left; baseball-sized cobbles on ground at researchers feet are pumice cobbles from the 2009(?) eruption of Redoubt volcano.
USGS research geologists Jamey Jones (left) and Erin Todd (right) discuss the "big picture" geology in their project area in and around Lake Clark National Park. Redoubt volcano in background left; baseball-sized cobbles on ground at researchers feet are pumice cobbles from the 2009(?) eruption of Redoubt volcano.
Male Bluethroat on the Seward Peninsula, Alaska. This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.
Male Bluethroat on the Seward Peninsula, Alaska. This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.
A scenic of Cabin Bay on Naked Island in Prince William Sound
A scenic of Cabin Bay on Naked Island in Prince William Sound