Wolves were reintroduced to Yellowstone National Park in 1995 and 1996.
Images
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Wolf in Yellowstone National Park
Wolves were reintroduced to Yellowstone National Park in 1995 and 1996.
Wolf in Yellowstone National Park
Wolves were reintroduced to Yellowstone National Park in 1995 and 1996.
Wolves were reintroduced to Yellowstone National Park in 1995 and 1996.
Wolf in Yellowstone National Park
Wolves were reintroduced to Yellowstone National Park in 1995 and 1996.
Wolves were reintroduced to Yellowstone National Park in 1995 and 1996.
A fire ecologist takes pictures of the location of the Red Eagle Fire.
A fire ecologist takes pictures of the location of the Red Eagle Fire in Montana, 2007.
A fire ecologist takes pictures of the location of the Red Eagle Fire in Montana, 2007.
An elk grazes in Yellowstone National Park.
Post-Harvest Rice Straw
After harvest, fields are reflooded to decay the remaining straw. This decaying material can fuel the bacteria that create methylmercury, even during the cold months.
After harvest, fields are reflooded to decay the remaining straw. This decaying material can fuel the bacteria that create methylmercury, even during the cold months.
Taking surface sediment measurements at Crissy Marsh in San Francisco, CA.
USGS researcher Jennifer Agee taking surface sediment oxidation-reduction and pH measurements at Crissy Marsh, a vegetated saltmarsh near the Golden Gate Bridge (background) in San Francisco, CA. Photographer: L. Windham-Myers.
USGS researcher Jennifer Agee taking surface sediment oxidation-reduction and pH measurements at Crissy Marsh, a vegetated saltmarsh near the Golden Gate Bridge (background) in San Francisco, CA. Photographer: L. Windham-Myers.
Adult Alligator
Large adult
Blue Ridge Parkway in Autumn
A section of the Blue Ridge Parkway in North Carolina with many fall colors underway.
A section of the Blue Ridge Parkway in North Carolina with many fall colors underway.
Mountain Lane and Pasture
A pasture and a bucolic country lane near Lake Glenville, North Carolina.
A pasture and a bucolic country lane near Lake Glenville, North Carolina.
Mountain Lane and Pasture
A pasture and a bucolic country lane near Lake Glenville, North Carolina.
A pasture and a bucolic country lane near Lake Glenville, North Carolina.
Mountain Lane and Pasture
A pasture and a bucolic country lane near Lake Glenville, North Carolina.
A pasture and a bucolic country lane near Lake Glenville, North Carolina.
Cross Section of Sagittal Otolith
Cross section of a sagittal otolith from a juvenile Chinook salmon 79 days after emergence. The letters represent: H = hatch, E = emergence, FF = first feed, FW = freshwater residence, TDCK = tidal delta check, and D = tidal delta residence (40x objective).
Cross section of a sagittal otolith from a juvenile Chinook salmon 79 days after emergence. The letters represent: H = hatch, E = emergence, FF = first feed, FW = freshwater residence, TDCK = tidal delta check, and D = tidal delta residence (40x objective).
Tree Farm
This tree farm in the mountains of western North Carolina generates income for its owners each year during North America's December holiday seasons.
This tree farm in the mountains of western North Carolina generates income for its owners each year during North America's December holiday seasons.
Tree Farm
This tree farm in the mountains of western North Carolina generates income for its owners each year during North America's December holiday seasons.
This tree farm in the mountains of western North Carolina generates income for its owners each year during North America's December holiday seasons.
Tree Farm
This tree farm in the mountains of western North Carolina generates income forits owners each year during North America's December holiday seasons.
This tree farm in the mountains of western North Carolina generates income forits owners each year during North America's December holiday seasons.
Tree Farm
This tree farm in the mountains of western North Carolina generates income for its owners each year during North America's December holiday seasons.
This tree farm in the mountains of western North Carolina generates income for its owners each year during North America's December holiday seasons.
Setting a Beach Seine
Members of the Nisqually tribe and U.S. Fish and Wildlife Service setting a beach seine in the Nisqually Reach of Puget Sound.
Members of the Nisqually tribe and U.S. Fish and Wildlife Service setting a beach seine in the Nisqually Reach of Puget Sound.
Setting a Beach Seine
Members of the Nisqually tribe and U.S. Fish and Wildlife Service setting a beach seine in the Nisqually Reach of Puget Sound.
Members of the Nisqually tribe and U.S. Fish and Wildlife Service setting a beach seine in the Nisqually Reach of Puget Sound.
Field of Sorghum
Field of grasses tentatively identified as sorghum.
Field of grasses tentatively identified as sorghum.
Live Oaks Along the Suwannee River at White Springs
Moss-hung live oaks along the Suwannee River at White Springs.
Moss-hung live oaks along the Suwannee River at White Springs.