Gecarcinus cuadratus, frontal view.
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Gecarcinus Cuadratus
Gecarcinus cuadratus, frontal view.
Sally lightfoot crab (Grapsus grapsus)
Two specimens of Grapus grapsus, dosal view and ventral view.
Two specimens of Grapus grapsus, dosal view and ventral view.
Cardisoma Crassum
Cardisoma crassum, reproductive organ.
Cardisoma crassum, reproductive organ.
Pacific lamprey (Lampetra tridentata)
Larval Pacific lamprey collected from the upper Umatilla River in northeastern Oregon.
Larval Pacific lamprey collected from the upper Umatilla River in northeastern Oregon.
Cardisoma Crassum
Cardisoma crassum, frontal view.
Cardisoma crassum, frontal view.
Eurytium Tristani
Eurytium tristani, frontal view.
Eurytium tristani, frontal view.
Sally lightfoot crab (Grapsus grapsus)
Grapus grapsus, dorsal view.
Eurytium Tristani
Eurytium tristani, ventral view.
Eurytium tristani, ventral view.
Sally lightfoot crab (Grapsus grapsus)
Grapus grapsus, frontal view.
Cardisoma Crassum
Cardisoma crassum, ventral view.
Cardisoma crassum, ventral view.
Rough box crab (Calappa gallus)
Calappa gallus, dorsal 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.