Images

A Sierra Marten (Martes caurina sierra) caught on wildlife camera in October 2019 passing beneath an elevated road segment built to study usage of the underpass by the Yosemite toad.

The photo features a Humboldt’s flying squirrel (Glaucomys oregonensis) caught on a wildlife camera. The camera was set up to study animal movement under a new road crossing structure known as the “toad road” in Sierra National Forest.

(A) Underneath the β-layer of the epidermis is an accumulation of hypereosinophilic necrotic debris. The remaining epidermis is extensively ulcerated.

Use of thermal imaging helps researchers to understand the relationship of fuels and fire effects, Valles Caldera National Preserve, New Mexico, 2019. 

Black Racer snake (A) The epidermis over much of the body, but cranially pronounced, has multifocal to coalescing dull white to pale gray foci. (B) Multiple scales around the head are thickened and roughened. (C) Ventrally, there are multiple dull white to grey foci of up to 8 mm size, occasionally with central indentations.  

This picture shows MJF in Reston working with his team on work planning guidance for the scientists funded by the Ecosystems Mission Area, Environmental Health Program

This Sierra Marten was caught on wildlife camera in October. The camera was set up to study animal movement under a new road crossing structure known as the “toad road” in Sierra National Forest. The Sierra marten (Martes caurina sierra) is a mammal in the weasel family about the size of a house cat.

Adult Sage Thrasher waiting to deliver food to its nestlings.    

A commercially caught wild black carp from the Mississippi River. Credit: USGS.

Cover of 2019 Energy and Wildlife Research report.

Boise State University Master’s student Kristina Parker carries a Great Basin rattlesnake (Crotalus oreganus lutosus). The snake’s head is enclosed in a plastic tube to allow her to safely handle it during the biological sample collection process.

A Great Basin rattlesnake (Crotalus oreganus lutosus) is coaxed into a plastic tube. This plastic tube allows researchers to safely handle the rattlesnake during biological sample collection.

Great Basin rattlesnake (Crotalus oreganus lutosus) held by snake tongs. The Great Basin rattlesnake is the only venomous snake in Idaho.

Boise State University Master’s student Kristina Parker uses a syringe to collect blood from a Great Basin rattlesnake (Crotalus oreganus lutosus). The blood’s ribonucleic acid, or RNA will be analyzed to track genetic change in the snake from habitat disturbances. RNA, along with deoxyribonucleic acid – or DNA, are the molecules that carry genetic information.

Boise State University Master’s student Kristina Parker and a volunteer use snake tongs to catch and hold down a rattlesnake.

After hiking to the location of the historic photo, USGS employee, Lisa McKeon, uses the alignment of mountains and permanent features to compose the same shot as the original.  Sometimes, determining the location can take a long time, requiring moving up and down a mountainside to find the exact spot.

USGS field biologist Andrea Mott displays a recently marked Tule White-fronted Goose.

Since the beginning of the USGS Repeat Photography Project in 1997, Grinnell Glacier has been photographed from the summit of Mount Gould multiple times, documenting the glacier’s retreat and the enlargement of Upper Grinnell Lake.  You can view previous images from this vantage point, as well as the entire collection on the

Chris Kephart and Harrison Dalby - discussing Ohio Microbiology Lab capabilities.

Mangrove forest in Pohnpei, Micronesia.

The USGS and partners are studying how mangrove forests in the Federated States of Micronesia may respond to sea-level rise over the coming century. Their projections will help Micronesian communities plan for the future.

The USGS and partners are studying how mangrove forests in the Federated States of Micronesia may respond to sea-level rise over the coming century. Their projections will help Micronesian communities plan for the future.