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Invasive black and white tegu lizards (Salvator merianae). USGS is working on development of tools for the detection and capture of invasive reptiles in Florida.
Invasive black and white tegu lizards (Salvator merianae). USGS is working on development of tools for the detection and capture of invasive reptiles in Florida.
Leaves changing color in autumn at the edge of a river in Grand Teton National Park, Wyoming (2016).
Leaves changing color in autumn at the edge of a river in Grand Teton National Park, Wyoming (2016).
Grinnell Glacier Ridge 2016
USGS personnel maintaining weather station on Sperry Glacier in Glacier National Park
USGS personnel maintaining weather station on Sperry Glacier in Glacier National Park
Greater Yellowstone Area ice patches, northwestern Wyoming
Greater Yellowstone Area ice patches, northwestern Wyoming
Danny Stahle assesses the preservation of Whitebark Pine melting out of an ice patch.
Danny Stahle assesses the preservation of Whitebark Pine melting out of an ice patch.
Danny Stahle catalogs a sample taken from a Whitebark Pine (Pinus albicalus) that died ~5,300 years before present as conditions cooled and the ice patch expanded.
Danny Stahle catalogs a sample taken from a Whitebark Pine (Pinus albicalus) that died ~5,300 years before present as conditions cooled and the ice patch expanded.
Lucas watches Danny Stahle catalog a sample taken froma long frozen Whitebark Pine (Pinus albicalus).
Lucas watches Danny Stahle catalog a sample taken froma long frozen Whitebark Pine (Pinus albicalus).
Field assistants prepare the trail and drilling location.
Field assistants prepare the trail and drilling location.
Danny Stahle, Rachel Reckin, and Sari Dersam prepare the trail and drilling location.
Danny Stahle, Rachel Reckin, and Sari Dersam prepare the trail and drilling location.
Researchers retrieving ice cores from an ice patch located on the Beartooth Plateau, Wyoming.
Researchers retrieving ice cores from an ice patch located on the Beartooth Plateau, Wyoming.
Craig Lee and a group of archeologist take a break and enjoy the scenery while standing over the coolers (white boxes) containing the ice core samples.
Craig Lee and a group of archeologist take a break and enjoy the scenery while standing over the coolers (white boxes) containing the ice core samples.
Mike Jayred, Nathan Challman, Rachel Reckin, and Danny Stahle work to lift an section of ice core from several meters deep in the ice patch.
Mike Jayred, Nathan Challman, Rachel Reckin, and Danny Stahle work to lift an section of ice core from several meters deep in the ice patch.
Mike Jayred, Nathan Challman, Rachel Reckin, and Danny Stahle work to lift an section of ice core from several meters deep in the ice patch.
Mike Jayred, Nathan Challman, Rachel Reckin, and Danny Stahle work to lift an section of ice core from several meters deep in the ice patch.
Mike Jayred, Nathan Challman, Rachel Reckin, and Danny Stahle work to lift an section of ice core from several meters deep in the ice patch.
Mike Jayred, Nathan Challman, Rachel Reckin, and Danny Stahle work to lift an section of ice core from several meters deep in the ice patch.
Mike Jayred cares the "Priaire Dog" Ice Drill to the coring location.
Mike Jayred cares the "Priaire Dog" Ice Drill to the coring location.
Mike Jayred and Nathan Chellman work to level the ice drill to begin taking the core. Craig Lee stabilizes the platform.
Mike Jayred and Nathan Chellman work to level the ice drill to begin taking the core. Craig Lee stabilizes the platform.
Nathan Chellman, Mike Jayred and Lucas (Dog) stage equipment on the drilling platform.
Nathan Chellman, Mike Jayred and Lucas (Dog) stage equipment on the drilling platform.
Mike Jayred runs the drill while Greg Pederson stabilizies the outer barrel. Craig Lee and Danny Stahle wait to assist with extraction of the first meter of ice.
Mike Jayred runs the drill while Greg Pederson stabilizies the outer barrel. Craig Lee and Danny Stahle wait to assist with extraction of the first meter of ice.
Craig Lee holds the ice drill with the end of the first ice core segment exposed. The sample will next be measured, logged, and processed in the field.
Craig Lee holds the ice drill with the end of the first ice core segment exposed. The sample will next be measured, logged, and processed in the field.
Mike Jayred runs the drill while Greg Pederson stabilizies the outer barrel. Craig Lee and Danny Stahle wait to assist with extraction of the first meter of ice.
Mike Jayred runs the drill while Greg Pederson stabilizies the outer barrel. Craig Lee and Danny Stahle wait to assist with extraction of the first meter of ice.