Images

Scenic view taken from a boat of mountains and coast in Khao Sok National Park.

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.

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.

Scenic Panjsher Valley hosts emerald deposits

Hindu Kush peak rises to about 17,000 feet.

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.

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.

Ant hill near grassland-forest ecotone near Tebicuary river. This former pasture has not been grazed since an endangered bird species was discovered here half a dozen years ago. The Ñeembucú Region is typified by extensive grasslands and wetlands. Near 26°34’52’’S, 56°49’18’’W. (Guyra Paraguay 2004, Annotated Checklist of the Birds of Paraguay, Paraguay.)

Side view of a wasp nest hanging from tree trunk in gallery forest of tributary to Tebicuary river. The stem-like structure attaching it to the trunk is part of the nest. Diameter approximately 40 cm. The Ñeembucú Region is typified by extensive grasslands and wetlands. Near 26°34’52’’S, 56°49’18’’W.

Cynomys leucurus peering from a burrow.

Squirrel stepping out from it's ground burrow.

Caracaras in gallery forest along Tebicuary river. 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. A total of 384 bird species have been recorded in this region, of which two have not been recorded elsewhere in Paraguay. Near 26°34’52’’S, 56°49’18’’W.

Underneath view of a wasp nest hanging from tree trunk in gallery forest of tributary to Tebicuary river. The diameter is approximately 40 cm. The Ñeembucú Region is typified by extensive grasslands and wetlands. Near 26°34’52’’S, 56°49’18’’W. (Portion of text from: Guyra Paraguay 2004, Annotated Checklist of the Birds of Paraguay, Paraguay.)