Images

Gastrocopta germindens shell viewed with a scanning electron microscope.

Hawaiia minuscula shell observed with a scanning electron microscope with aperture facing down.

Radiodiscus millecostatus shell viewed with a scanning electron microscope.

Gastrocopta pentodon shell viewed with a scanning electron microscope with a zoom-in of the aperture.

An unidentified cow (Bovidae Family) with cattle egrets (Bubulcus ibis) in the grass. Deforestation is visible in the background.

Glen Black of GLSC and Angela Wahlquist of Northland College places fyke net in wetland vegetation in Fish Creek Slough of Lake Superior near Ashland, Wisconsin, as part of a study of bioindicators of wetland degradation in the Great Lakes. This study is funded by the U.S.

Wildlife Biologist Bruce Hanson conducting a breeding bird survey.

Northern Leopard Frog (Rana pipiens).

Todd Preston, USGS contract scientist, collecting a surface-water sample from a Prairie Pothole wetland.

Graduate student Christiane Roy placing suspended invertebrate traps in the experimental ponds by kayak.

Underwater light sensor deployed under the mangrove canopy where corals are growing.

A biologist examines an American bullfrog along the Yellowstone River near Billings, MT.

Gray jay perched on tree in the Presidential Range, White Mountains, NH

The transition zone between the Missouri River and Ft. Peck Reservoir.

An American alligator and a Burmese python locked in a struggle to prevail in Everglades National Park. This python appears to be losing, but snakes in similar situations have apparently escaped unharmed, and in other situations pythons have eaten alligators.

USGS scientists Bill Orem (left) and Terry Lerch (right) recording data and collecting samples at a Balkan endemic nephropathy (BEN) household in Serbia. BEN patients typically come from small villages and are often farmers.

Two Yupik Eskimo students from Chevak, Alaska holding a tundra swan cygnet. These student volunteers were helping with an annual USGS waterfowl banding program along the Kashunuk River near the Bering Sea coast in western Alaska.

Green anaconda in Brazil. The snake pictured is a representative of a species discussed in the USGS snake risk assessment. This snake was photographed in its native range.

Yellow anaconda in Argentina. The snake pictured is a representative of a species discussed in the USGS snake risk assessment. This snake was photographed in its native range.

Boa Constrictor (Boa constrictor) at a county park in southeastern Miami. Photo courtesy of Mike Rochford, University of Florida. Used with permission.

A female Burmese python (Python molurus) on her nest with eggs. Photo by Jemeema Carrigan, University of Florida. Courtesy of Skip Snow, National Park Service. Used with permission.