Eurytium tristani, ventral view.
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Eurytium Tristani
Eurytium tristani, ventral view.
Endangered California Condor
An endangered California condor flies over the Bitter Creek National Wildlife Refuge, California.
An endangered California condor flies over the Bitter Creek National Wildlife Refuge, California.
Torrey Pines State Reserve
Scenic view of coastline at the Torrey Pines State Reserve.
Scenic view of coastline at the Torrey Pines State Reserve.
Torrey Pines State Reserve
Scenery from the Torrey Pines State Reserve.
Scenery from the Torrey Pines State Reserve.
Torrey Pine (Pinus torreyana)
Torrey Pine.
Torrey Pines State Reserve
Scenery of coastline from the Torrey Pines State Reserve.
Scenery of coastline from the Torrey Pines State Reserve.
Crowberry
Crowberry plant with berries.
Crowberry plant with berries.
Needle, Custer State Park
Sunset at The Needle, a geologic formation in Custer State Park.
Sunset at The Needle, a geologic formation in Custer State Park.
Black-Tailed Prairie Dog ( Cynomys ludovicianus )
Black-tailed prairie dog from the Prairie Dog Town colony at Buffalo Gap National Grasslands.
Black-tailed prairie dog from the Prairie Dog Town colony at Buffalo Gap National Grasslands.
Surface sediment sampling in a vegetated Louisiana saltmarsh.
Surface sediment sampling in a vegetated Louisiana saltmarsh.USGS researchers Jennifer Agee and Le Kieu sampling surface sediment in a vegetated Louisiana saltmarsh. Photographer: M. Marvin-DiPasquale.
Surface sediment sampling in a vegetated Louisiana saltmarsh.
Surface sediment sampling in a vegetated Louisiana saltmarsh.USGS researchers Jennifer Agee and Le Kieu sampling surface sediment in a vegetated Louisiana saltmarsh. Photographer: M. Marvin-DiPasquale.
Prairie Restoration
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.
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.
Scouting field sites, by raft, on the White Salmon River, WA
Scouting field sites, by raft, on the White Salmon River, WAPat 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.
Scouting field sites, by raft, on the White Salmon River, WA
Scouting field sites, by raft, on the White Salmon River, WAPat 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.
Trawling for Delta Smelt aboard the USGS Research Vessel Sentinel
Trawling for Delta Smelt aboard the USGS Research Vessel SentinelTrawling for Delta Smelt using a Kodiak Trawl in the Sacramento River aboard the USGS Research Vessel Sentinel.
Trawling for Delta Smelt aboard the USGS Research Vessel Sentinel
Trawling for Delta Smelt aboard the USGS Research Vessel SentinelTrawling for Delta Smelt using a Kodiak Trawl in the Sacramento River aboard the USGS Research Vessel Sentinel.
Invasive Zebra Mussels
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.
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.
Ruddy Duck (Oxyura jamaicensis)
Male ruddy duck swimming in water.
Male ruddy duck swimming in water.
Ruddy Duck (Oxyura jamaicensis)
Female ruddy duck swimming in water.
Female ruddy duck swimming in water.
Red-Breasted Merganser Ducks (Mergus serrator)
Mergansers swimming in water.
Hooded Merganser (Lophodytes cucullatus)
Hooded Merganser (Lophodytes cucullatus).
Hooded Merganser (Lophodytes cucullatus).
Monarch Butterfly
Monarch butterfly on dense blazing star.
Monarch butterfly on dense blazing star.
Monarch Butterflies on Dense Blazing Star
Image of the butterflies Danaus plexippus on the purple flowers of Liatris spicata.
Image of the butterflies Danaus plexippus on the purple flowers of Liatris spicata.
Rice Paper Butterfly (Idea leuconoe)
Rice Paper Butterfly on leaf.