Images

Nine-year-old pallid sturgeon wait in holding tanks for their turn to be evaluated by biologists at CERC.  More than 100 pallid sturgeon made the trip from Gavins Point National Fish Hatchery to Columbia on a snowy December day.

Beau Griffith, a biological technician at CERC, stands at the bottom of one of the newly reconstructed ponds designed to conduct long-term studies with sturgeon and other riverine species.  A divider and circulators can be installed in the sandy-bottomed ponds to create the continuous water current that sturgeon prefer.

USA-National Phenology Network citizen-scientist Lucille Tower records the one millionth observation on maple vine in the large nature database.

This southern sea otter is settling down to rest in a small patch of Egregia (feather boa kelp). Find more sea otter photos at the USFWS Ventura sea otter Flickr gallery.

From the U.S. Geological Survey Photographic Library, No. 2011DENPH0239, folder 3, Field Surveys - Antarctica. It was taken during the U. S. Geological Survey Byrd Land Survey Traverse, United States Antarctic Research Program, 1966-67.

Here is a study deer after capture and being radio-collared. The tracking information from this collar will enable researchers and managers to track the migrations of mule deer and evaluate their habitat and population performance and will aid in management of mule deer populations in Wyoming.  

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

Magnolia warbler in the Presidential Range, White Mountains, NH

Yellow bellied flycatcher in the Presidential Range, White Mountains, NH

A hatched embryo of a pallid sturgeon. 

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

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.

Bivalve mollusk with a highly-ornamented shell. (Scanned From Negative)

National Wetlands Research Center workers set bench marks to study marsh subsidence.

Spiraxis sp. shell viewed with a scanning electron microscope with aperture facing up.

Spiraxis sp. shell viewed with a scanning electron microscope with aperture facing up.

Striatura meridionalis shell viewed with a scanning electron microscope.

Marc Blouin, NBS Research Biologist, uses an electrofishing boat to obtain information on fish populations in the Black River in Lorain, Ohio.

Removal of esophageal contents from a 2-week old mallard duckling.

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