Gulls, such as this Iceland gull, play an important role in moving avian flu viruses across the North Atlantic between Europe and North America.
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Iceland Gull
Gulls, such as this Iceland gull, play an important role in moving avian flu viruses across the North Atlantic between Europe and North America.
Bull elk group moving near snowy hills
Line of bull elk moving across field with snow-covered Wyoming hills in the background.
Line of bull elk moving across field with snow-covered Wyoming hills in the background.
Soil Next to a Dime
Amount of soil (about 200 mg) from which Geomyces destructans was cultured. This shows the small amount of soil needed to harbor live fungus and the threat that humans might pose in moving it around from cave to cave on their gear, boots, and clothing.
Amount of soil (about 200 mg) from which Geomyces destructans was cultured. This shows the small amount of soil needed to harbor live fungus and the threat that humans might pose in moving it around from cave to cave on their gear, boots, and clothing.
Hoover Dam and Lake Mead
View of Hoover Dam and Lake Mead from the Mike O'Callaghan–Pat Tillman Memorial Bridge (Colorado River Bridge).
View of Hoover Dam and Lake Mead from the Mike O'Callaghan–Pat Tillman Memorial Bridge (Colorado River Bridge).
Invasive brown treesnake
Brown treesnakes were a major contributor to the loss of nine of 11 native forest birds on Guam.
Brown treesnakes were a major contributor to the loss of nine of 11 native forest birds on Guam.
Creek Chub
Creek Chub (Semotilus atromaculatus): this species is widely distributed in streams and rivers of eastern US and Canada.
Creek Chub (Semotilus atromaculatus): this species is widely distributed in streams and rivers of eastern US and Canada.
Sagebrush in the Great Basin, UT
Sagebrush in the Great Basin, Utah
Wolf eyes close up
Close up of wolf eyes
Whooping Crane Chick
This adolescent chick, hatched and raised at the USGS Patuxent Wildlife Research Center, is one of ten whooping cranes being released in Louisiana in February 2011. It is a milestone for the state and for the birds, which have not lived in the state since the 1950s.
This adolescent chick, hatched and raised at the USGS Patuxent Wildlife Research Center, is one of ten whooping cranes being released in Louisiana in February 2011. It is a milestone for the state and for the birds, which have not lived in the state since the 1950s.
Aspens, Autumn, and Idaho
Aspens in Idaho showing their yellow foliage of autumn.
Aspens in Idaho showing their yellow foliage of autumn.
Autumn at Undine Falls
Vegetation bordering a Yellowstone canyon at Undine Falls.
Vegetation bordering a Yellowstone canyon at Undine Falls.
Autumn at Undine Falls
Vegetation bordering a Yellowstone canyon at Undine Falls.
Vegetation bordering a Yellowstone canyon at Undine Falls.
Western Skink
The Western skink (Plestiodon skiltonianus) is a relatively common and widespread lizard in Southern California. It is more secretive and prefers more grassy habitat than the Western fence lizard or the side-blotched lizard, yet USGS and National Park Service biologists are finding signs of genetic isolation in all these species.
The Western skink (Plestiodon skiltonianus) is a relatively common and widespread lizard in Southern California. It is more secretive and prefers more grassy habitat than the Western fence lizard or the side-blotched lizard, yet USGS and National Park Service biologists are finding signs of genetic isolation in all these species.
Closed lodgepole pinecone
A closed lodgepole pinecone on a tree in the Sierra Nevada.
A closed lodgepole pinecone on a tree in the Sierra Nevada.
Gibbon River
Meandering of the Gibbon River at Yellowstone National Park.
Meandering of the Gibbon River at Yellowstone National Park.
Yellowstone Autumn Trails
A hiking trail in the back country of Yellowstone National Park.
A hiking trail in the back country of Yellowstone National Park.
Extremophilic Microbial Mats
Water run off from the Excelsior geyser hot spring. Various extremophilic microbial mats (Domains Archaea and Eubacteria) living in the hot springs, acidic habitats, and geyser basins. Notice the bands of color as microbial populations separate according to their tolerance for differing temperature and/or pH gradients.
Water run off from the Excelsior geyser hot spring. Various extremophilic microbial mats (Domains Archaea and Eubacteria) living in the hot springs, acidic habitats, and geyser basins. Notice the bands of color as microbial populations separate according to their tolerance for differing temperature and/or pH gradients.
Autumn Vista Along the Snake River
Autumn foliage on the Snake River.
Snake River and Hints of Autumn
A portion of the Snake River as it winds its way through Yellowstone National Park.
A portion of the Snake River as it winds its way through Yellowstone National Park.
Autumn Vista Along the Snake River
Coniferous trees along the Snake River.
Coniferous trees along the Snake River.
Ranchlands, Utah and Idaho
Roadsides, ranchlands, and mountains.
Roadsides, ranchlands, and mountains.