A USGS herpetologist with a Sonora Mud Turtle (Kinosternon sonoriense; photo left) and Red-eared Slider (Trachemys scripta elegans;
photo right) at Montezuma Well, Montezuma Castle National Monument.
Images
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Herpetology
A USGS herpetologist with a Sonora Mud Turtle (Kinosternon sonoriense; photo left) and Red-eared Slider (Trachemys scripta elegans;
photo right) at Montezuma Well, Montezuma Castle National Monument.
Minute Gem Snail (Hawaiia minuscula)
Hawaiia minuscula shell viewed with a scanning electron microscope with aperture facing up.
Hawaiia minuscula shell viewed with a scanning electron microscope with aperture facing up.
Glossy Granule Snail (Guppya gundlachi)
Ventral view of Guppya gundlachi shell observed with a scanning electron microscope.
Ventral view of Guppya gundlachi shell observed with a scanning electron microscope.
Ribbed Pinwheel Snail (Radiodiscus millecostatus)
Radiodiscus millecostatus shell viewed with a scanning electron microscope with aperture facing up.
Radiodiscus millecostatus shell viewed with a scanning electron microscope with aperture facing up.
Lucidella lirata
Lucidella lirata shell viewed with a scanning electron microscope.
Lucidella lirata shell viewed with a scanning electron microscope.
Yam Babybody Snail (Pupisoma dioscoricola)
Pupisoma dioscoricola shell viewed with a scanning electron microscope.
Pupisoma dioscoricola shell viewed with a scanning electron microscope.
Median Striate Snail (Striatura meridionalis)
Striatura meridionalis shell viewed with a scanning electron microscope.
Striatura meridionalis shell viewed with a scanning electron microscope.
Thysanophora caecoides
Thysanophora caecoides shell viewed with a scanning electron microscope.
Thysanophora caecoides shell viewed with a scanning electron microscope.
Strobilops sp.
Strobilops sp. shell viewed with a scanning electron microscope.
Strobilops sp. shell viewed with a scanning electron microscope.
Chanomphalus pilsbryi
Chanomphalus pilsbryi shell viewed with a scanning electron microscope.
Chanomphalus pilsbryi shell viewed with a scanning electron microscope.
Ornamented Bivalve Mollusk
Bivalve mollusk with a highly-ornamented shell. (Scanned From Negative)
Bivalve mollusk with a highly-ornamented shell. (Scanned From Negative)
Studying Marsh Subsidence
National Wetlands Research Center workers set bench marks to study marsh subsidence.
National Wetlands Research Center workers set bench marks to study marsh subsidence.
Upstream View of the Rio Nigua at Turnpike
When the river stops flowing the channel becomes brushy because of the moisture in the river bottom. The location is 17º59'15"N, 66º17'40" and the elevation is 10 m. All photographs are at the same location.
When the river stops flowing the channel becomes brushy because of the moisture in the river bottom. The location is 17º59'15"N, 66º17'40" and the elevation is 10 m. All photographs are at the same location.
Cattle and Cattle Egrets (Bubulcus ibis)
A pair of unidentified grazing cattle (Bovidae Family) with cattle egrets (Bubulcus ibis) in the grass. Deforestation is visible in the background.
A pair of unidentified grazing cattle (Bovidae Family) with cattle egrets (Bubulcus ibis) in the grass. Deforestation is visible in the background.
Removing Blood Sample of Shortnose Sturgeon
Removing a blood sample from a shortnose sturgeon to determine a colorimetric technique for revealing sex and establish contaminant levels.
Removing a blood sample from a shortnose sturgeon to determine a colorimetric technique for revealing sex and establish contaminant levels.
Oil Well
Oil well and a looming storm.
Brine Pit
Brine pit in Sheridan County, Montana.
Brine pit in Sheridan County, Montana.
Electrofishing Boat
Marc Blouin, NBS Research Biologist, uses an electrofishing boat to obtain information on fish populations in the Black River in Lorain, Ohio.
Marc Blouin, NBS Research Biologist, uses an electrofishing boat to obtain information on fish populations in the Black River in Lorain, Ohio.
Fish Catch
Biologists inspect fish catch from trawl net.
Biologists inspect fish catch from trawl net.
Hello Penguin
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.
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.
Louisiana Black Bear and Cubs
A threatened Louisiana black bear and her cubs up in a tree.
A threatened Louisiana black bear and her cubs up in a tree.