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Eastern bluebird flapping its wings in a bird bath.

U.S. Geological Survey hydrologists preparing periphyton algae samples from rocks collected in Rapid Creek.

Rural land type simulated by the Onondaga Lake basin model

USGS hydrologists monitor data collection during a geophysical survey using the horizontal-to-vertical ambient-noise seismic method. This method can be used to estimate unconsolidated sediment thickness and map the bedrock surface as part of groundwater investigations.

Marbled Godwit on a nest near Ugashik, Alaska.

Example of a pump and plumbing configuration used by public water systems. About 105 million people—or more than one-third of the Nation's population—receive their drinking water from one of the 140,000 public water systems across the United States that rely on groundwater pumped from public wells.

Soil sampling in Eastern Colorado indicated that some chemicals introduced to nonirrigated farmland through biosolids application persisted through 468 days, and some chemicals were sufficiently mobile to be detected in soil as deep as 126 centimeters below land surface.

Close-up of Colpophyllia natans in shallow water.

Colpophyllia natans in shallow water.

Oreaster reticulatus in shallow water.

Condylactis gigantea fluourescing on rocks. The anemones are in a tank illuminated by ultraviolet (black) light. The anemones absorb the invisible ultraviolet light and reflect it back as visible bright green light.

Two long-spined sea urchins surrounded by rocks in shallow water.

Long-spined sea urchins surrounded by rocks in shallow water.

Birds found in and around the Salton Sea, California.

Banded iron formation. Core room of Vale do Rio Doce Company, Carajás iron mine. Searching for life on Mars using Mars analogs in Australia.

Drilling for mineral resources near Canyonlands National Park, Utah

skimmer dragonfly (Odonata: Libellulidae)

A side channel of the Matanuska River. Results from this study were published in Curran, J.H., McTeague, M.L., Burril, S.E., and Zimmerman, C.E., 2011, Distribution, persistence, and hydrologic characteristics of salmon spawning habitats in clearwater side channels of the Matanuska River, southcentral Alaska: U.S.

The Georgia Fire consisted of two fires, the Sweat Farm Road fire and the Big Turnaround fire. The fires were located 10 miles (16 kilometers) southwest of Waycross, Georgia, and were separated by Swamp Road.