Images

Gecarcinus cuadratus, ventral view.

Grapus grapsus, dorsal view.

Cardisoma crassum, ventral view.

Eurytium tristani, frontal view.

Eurytium tristani, ventral view.

Gecarcinus cuadratus, dorsal view.

Gecarcinus cuadratus, frontal view.

An endangered California condor flies over the Bitter Creek National Wildlife Refuge, California.

Scenery from the Torrey Pines State Reserve.

Scenery of coastline from the Torrey Pines State Reserve.

Torrey Pine.

Scenic view of coastline at the Torrey Pines State Reserve.

Crowberry plant with berries.

Sunset at The Needle, a geologic formation in Custer State Park.

Black-tailed prairie dog from the Prairie Dog Town colony at Buffalo Gap National Grasslands.

USGS researchers Jennifer Agee and Le Kieu sampling surface sediment in a vegetated Louisiana saltmarsh. Photographer: M. Marvin-DiPasquale.

Native prairie restoration on former cropland near Vincennes, Indiana. Changes from intense agricultural use to grasslands and forests can affect carbon dynamics and wildlife habitat.

Trawling for Delta Smelt using a Kodiak Trawl in the Sacramento River aboard the USGS Research Vessel Sentinel.

Pat Connolly (USGS-CRRL), Greg Morris (Yakama Nation), and Jeff Spencer (Yakama Nation) on a scouting and field planning trip on the White Salmon River, WA. Personnel were planning for studies of resident rainbow trout in the White Salmon River prior to removal of Condit Dam, which was breached in 2011.

The zebra mussel (Dreissena polymorpha) is a small, non-native mussel originally found in Russia. In 1988, this animal was transported to North America in the ballast water of a transatlantic freighter and colonized parts of Lake St. Clair. In less than ten years, zebra mussels spread to all five Great Lakes.

Mergansers swimming in water.