Images

Photomicrograph depicting the siliceous frustules of fifty species of diatoms arranged within a circular shape. Diatoms form the base of many marine and aquatic food chains and upon death, their glassy frustules form sediments known as diatomaceous earth.

Photomicrograph depicting the siliceous frustulesof fifty species of diatoms arranged within a circular shape. Diatoms form the base of many marine and aquatic food chains and upon death, their glassy frustules form sediments known as diatomaceous earth.

The grey, coiled seashell of Olivella semistriata with the aperture (shell opening) facing up. Photograph taken 2002 or earlier.

A pair of Caracolus sagemon.

Colorful and coiled seashells of Olivella semistriata with the apertures (shell openings) facing up. Photograph taken 2002 or earlier.

This camera station is located on a hill within the newly established Saguaro National Monument near Tucson. The view is northeast toward Agua Caliente Hill and looks down a gentle incline that drains into Tanque Verde Creek. The saguaro stand pictured here is a particularly memorable one because of the many large individuals and absence of small ones.

Young boys working in a newly cropped field in Africa.

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.

The U.S.

A copper-striped blue-tailed skink (Emoia impar) photographed in Samoa during a USGS field survey.

Some Polar bears in the Arctic can swim in excess of 200 miles.

This landslide occurred at La Conchita, California in 2005. Ten people were killed.

The outlet tubes of Glen Canyon Dam were opened during the 2004 high-flow experiment on the Colorado River. 

Aquatic biologist Tom Sabol of the Grand Canyon Monitoring and Research Center takes samples from the Colorado River.

A frosty day in North Dakota near the Hear River above Lake Tschida, near Glen Ullin, streamgage.

A sample of gas hydrates collected from Mallik, Canada. Gas hydrates are naturally-occurring “ice-like” combinations of natural gas and water that have the potential to provide an immense resource of natural gas from the world’s oceans and polar regions.

A drill rig in the Fayetteville Shale gas play of Arkansas.

Herring larvae 53 day post-hatch. Black pigmentation is evident.

Naturally-deposited herring eggs attached to submerged macrophytes. Coiled embryos are evident inside the eggs.

Small herring spawning event in Puget Sound, evidenced by the presence of 'white water', caused by mass release of spawning products into the water.

These juvenile bighead carps are used to find potential physical, biological or chemical controls as part of an integrated pest management approach for natural resource managers.

Asian carp are invasive species that could pose substantial environmental risks and economic impacts if they become established.