Images

A Pacific Chorus frog (Pseudacris regilla) in a meadow located in Yosemite National Park.

USGS scientists examine a Double-crested Cormorant (Phalacrocorax auritus) and measure the length of its wing chord.

USGS scientists examine a Double-crested Cormorant (Phalacrocorax auritus) and measure the length of its tarsus.

USGS scientists examine a Double-crested Cormorant (Phalacrocorax auritus) and measure the length of its wing chord. 

USGS scientists from the National Wildlife Health Center respond to wildlife disease events in the field.

Larval samples collected near the confluence of the Missouri and Mississippi Rivers.

Sturgeon larva captured near the confluence of the Missouri and Mississippi Rivers. 

Researcher with Humpback Chub during fish seining efforts

Biologists were able to document the spawning of female pallid sturgeon code 30 as she released during a recapture event in the Yellowstone River near Fairview, MT.

A three-lined salamander (Eurycea guttolineata) discovered in Prince William Forest Park, VA.

Barred Tiger Salamanders and fathead minnows in amphibian type funnel trap, Kidder County, ND. 

Spectacled Eiders nest along Arctic coasts of Alaska and Russia and on the Yukon-Kuskokwim Delta in Alaska. Spectacled eiders arrive on the breeding grounds as pairs in late-May or in June. 

The European green crab (Carcinus maenas), has invaded fisheries in Northern California and in British Columbia, where it may compete with the much more valuable Dungeness crab.

USGS and Virginia Tech scientists captured female northern bats and fitted them with tiny radiotransmitters and numbered armbands. The bats were then released and tracked to determine what roosts they were using. 

Eastern Swallowtail butterfly in a flower garden.

A Gray-cheeked Thrush perched in a shrub. This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.

Male Lapland Longspur in the tundra. This photo was taken on the Seward Peninsula as part of the Changing Arctic Ecosystem Boreal-Arctic Transition Zone program.

Eggs collected from pallid sturgeon spawned in hatcheries are placed onto an artificial rock substrate.  Pallid sturgeon eggs are extremely sticky after fertilization and adhere to the artificial substrate, even in a current. 

Lesser black-backed gulls (Larus fuscus) seen during field work in Iceland in 2012.

Roza Dam, on the Yakima River, in Washington State.

Wetlands Reserve Program site in Sabine Parish, Louisiana.  Landowner restored his often-flooded cattle pasture to its natural wetland state by creating shallow water areas, establishing food plots and pollinator plots, and installing wood duck nesting boxes.