Images

View of Snake River winding through trees with mountains in background.

View of Mu Ko Thong (Marine) National Park.

View of Mu Ko Thong (Marine) National Park.

Sloping landform with a cavity that opens out to the shore. Other landforms can be seen behind, covered in vegetation.

Trees cast in shadow lie in the foreground as mountains rise in the back. The Snake River flows at the bottom of step-like slopes.

View of coniferous forests covering the mountainside.

USGS scientist measuring pH, Specific Conductance and dissolved oxygen in a remediation ditch constructed with local volcanic rock possessing some acid neutralizing capacity.  

Brown's Gulch is below the Brooklyn Mine, a few miles north of Siverton, Colorado, in the Mineral Creek basin.

Cement Creek following storm event in July, 2004. Note the orange discoloration of the stream derived from weathering of bedrocks and from mined areas. This type of event happens frequently in the Animas Watershed near Silverton, Colorado. View is to the south, with Kendall Mountain in the distance.

Hindu Kush peak rises to about 17,000 feet.

Scenic Panjsher Valley hosts emerald deposits

Many aspen groves in Yellowstone National Park are failing to regenerate.

This cuckoo bee, or Nomada vegana, is a native bee species associated with open grassland habitats in northwest Indiana. It is a parasitic bee that lays its eggs in nests of other bees.

Balanced Rock, a famous attraction in Arches National Park. Photograph taken after noon.

Cosby Creek under average flow conditions in Great Smoky Mountains National Park near the Cosby Campground near Cosby, TN

The Alluvial Fan is a fan-shaped area of disturbance in Rocky Mountain National Park. It was created on July 15, 1982, when the earthen Lawn Lake Dam above the area gave way, flooding the Park and nearby town of Estes Park with more than 200 million gallons of water. Enormous boulders were displaced, and trees and earth were ripped from the ground.

USGS' Steve Hanser holding a Brewer's sparrow (Spizella breweri).

Small waterfall in the Gunnison River Canyon.

Waterfall in a mountain river.

Two Cynomys leucurus peering from the neck of a burrow.

Source: USGS Northern Rocky Mountain Science Center. Photographer: P.S. Corn. Boreal Chorus Frogs in amplexus, Black Rock Pond, Teton County, Wyoming. May 2004
Pseudacris maculata - Boreal Chorus Frog

Hollow in living tree in gallery forest of tributary to Tebicuary river. Grey feathers stuck along bottom of entrance suggest that it may be used by a bird. Paraguay is home to at least 589 breeding bird species and 120 migratory bird species. The Ñeembucú Region is typified by extensive grasslands and wetlands.