Images

Christina Ahlstrom holding a gull tagging with a satellite transmitter.

Black-legged Kittiwakes and Common Murres flush from a Bald Eagle at their breeding colony at Gull Island, Alaska.

Common Murres with visibly protruding keels flush from Gull Island, Kachemak Bay, Alaska.

Black-legged Kittiwakes forage on Pacific sand lance and capelin near their colony on Gull Island, Cook Inlet on June 28, 2018. 

A spawning Yukon River Chinook salmon (Oncorhynchus tshawytscha) captured near Pilot Station, Alaska, in June 2018 as part of an experimental temperature manipulation study to validate heat stress biomarkers.

Female McKay's Bunting on St. Matthew Island.

Male McKay's Bunting on St. Matthew Island

USGS and NPS scientists measuring discharge and collecting water chemistry in small tributary to the Cutler River in the early summer. This work is part of the Hydro-Ecology of Arctic Thawing (HEAT): Hydrology project that takes place in the Arctic Netwo

Scientists setting up a weatherport for shelter while conducting research on St. Matthew Island Alaska.

An experimental tank used in a thermal challenge experiment for adult salmonids. The upper lobe of an adult Chinook salmon (Oncorhynchus tshawytscha) caudal fin is visible in the center of the water surface.

Lesser Yellowlegs typically consume insects, such as flies, beetles, and mayflies, small fish, crustaceans, aquatic worms, mollusks, spiders, and seeds. Lesser Yellowlegs are active foragers and are commonly observed walking rapidly through shallow wetlands while pursuing prey. 

Ocean bottom seismometers being loaded onto the R/V Sikuliaq to be deployed on the sea floor in the Gulf of Alaska.

Stratigraphic contact marking uplift of Montague Island, caused by slip on the Patton Bay fault system during the 1964 M9.2 Great ALaska Earthquake. 

Approaching the Taku River via helicopter to perform fieldwork.

Brielle Heflin noosing Common Murres off their colony at Gull Island, Alaksa.

Lesser Yellowlegs typically consume insects, such as flies, beetles, and mayflies), small fish, crustaceans, aquatic worms, mollusks, spiders, and seeds. Lesser Yellowlegs are active foragers and are commonly observed walking rapidly through shallow wetlands while pursuing prey.

(Left to right) Danny Brothers (USGS Pacific Coastal and Marine Science Center [PCMSC]), Peter Haeussler (USGS Alaska Science Center), Maureen Walton (PCMSC), and Jamie Conrad (PCMSC) select seafloor sediment samples from cores collected along the Queen Charlotte-Fairweather fault.

USGS and Geological Survey of Canada scientists sample sediment cores collected from the sea floor along the Queen Charlotte Fault. This was taken while they were working with (or in) the Geological Survey of Canada.

Researchers use ground penetrating radar to determine the depth of the snow on Wolverine Glacier. Wolverine Glacier is in the Kenai Mountains on the coast of south-central Alaska. In 1966 scientists with the USGS began making direct measurements of surface mass balance at Wolverine Glacier, one of the "benchmark glaciers" in Alaska.

USGS hydrologist monitoring water quality and collecting samples at USGS Station15015595 on the Unuk River, Alaska. In 2019, the USGS began studying the baseline water-quality of selected transboundary rivers in Alaska.

Emperor geese gathered near the shoreline on Kodiak Island.