Images

Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.

Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.

Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.

Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.

Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.

Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.

Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.

Copper River sonar on a bridge

Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.

Knik River bridge aerial view

Andrew Reeves retrieving samples within Izembek National Wildlife Refuge, Alaska as part of USGS research to investigate the persistence of avian influenza viruses in North American wetlands.  USGS scientists and colleagues found that influenza A viruses may remain infectious in surface waters of northern wetlands for more than seven months. 

Skulls were collected in Spring 2018 & 2019 from coastlines throughout Alaska. It is assumed the animals died of natural causes over the preceding winters. They were collected under Marine Mammal Permit # 067925.

Twentymile bridge

USGS scientists, working with researchers from the University of Ghent, probed the floor of Eklutna Lake, Anchorage Borough, Alaska, for evidence of turbidity currents triggered by strong shaking during the 2018 Mw7.1 Anchorage earthquake.

Unuk River sampling site.

Impacts of iron mobilization in a stream tributary of the Akillik River located in Kobuk Valley National Park, Alaska. These images were taken two years apart. The clear picture was taken in June 2016 and the orange picture was August 2018. 

Distant Early Warning (DEW) Line site contractor and Todd Atwood (USGS) walking the perimeter of the Alaska Oliktok Point Dew Line site and discussing polar bear safety.

Polar bear near the Kaktovik, Alaska, Distant Early Warning (DEW) Line site. In fall, polar bears gather at Kaktovik to feed on the remains of subsistence-harvested bowhead whales. Human-bear encounters at the DEW Line site are common.

USGS uses survey drones, which are also termed “unoccupied aerial systems” or UAS, to survey walruses resting on shore.  Use of these small survey drones enables collection of replicated surveys with minimal risk to walruses and humans.  Being able to collect numerous replicate surveys enables precise estimates of walrus population abundance when these sur

Todd Atwood (USGS), left, and Harry Stern (University of Washington), right, reviewing the Alaska Oliktok Point Distant Early Warning (DEW) facility bear safety video.

USGS uses survey drones, which are also termed “unoccupied aerial systems” or UAS, to survey walruses resting on shore.  Use of these small survey drones enables collection of replicated surveys with minimal risk to walruses and humans.  Being able to collect numerous replicate surveys enables precise estimates of walrus population abundance when these sur