Images

USGS hydrographer measuring streamflow using a handheld Acoustic Doppler Velocimeter in fast moving floodwater Cajon Creek near Keenbrook, California. 

USGS Streamgaging Station in northern Nevada. 

USGS technician measuring streamflow in northern Nevada.

Monarch butterfly on a Joe Pyeweed plant.

A monarch butterfly on a hairy puccoon plant.

For the first time, high-resolution images show the three-dimensional structure of massive ice deposits on Mars. 

This NASA HiRISE image shows an icy scarp on Mars in the context of a broader area. 

Bats hibernating in a cave. 

Muddy Creek in the San Rafael Swell with white surface salts. 

Coral reefs are prone to phase shifts where they quickly transition from coral-dominated to a uniformity of other organisms, typically algae. The Palmyra Atoll National Wildlife Refuge in the Central Pacific is a unique case where a transition from corals to corallimorphs occurred.

While these gates might look similar to the entry way of a medieval castle, they are actually part of a scientific experiment that will help scientists design more effective fish passage structures for American Shad. Photo by Kevin Mulligan, USGS.

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This image shows a sea lamprey in its larvae phase.

This microscopic image shows a sun-shaped area within turtle skin cells where chelonid herpesvirus 5 replicates. The virus capsids, or protein shells, are arrayed like a corona around the circle. ChHV5 is associated with fibropapillomatosisa tumor disease affecting endangered green turtles.

This image shows the blue version of sylvatic plague vaccine bait for prairie dogs. 

Prairie dogs in the wild are less likely to succumb to a deadly disease called sylvatic plague after they ingest peanut-butter-flavored bait that contains a vaccine against the disease.

Introduced Phragmites australis, also called the common reed, is an invasive grass in the Great Lakes.

For the first time, high-resolution images show the three-dimensional structure of massive ice deposits on Mars. 

This high-resolution NASA HiRISE image shows a detailed subsection of an icy scarp on Mars in enhanced color. 

Dry wash in San Rafael Desert with white surface salts. White efflorescent salts form on the soil surface as water evaporates from the soil leaving the salt at the surface. 

The arrows in this image point to mouths of individual corallimorphs, which are a type of invasive anemone that typically thrives in coral reefs that have been degraded by environmental or man-made disturbances. Each corallimorph mouth is surrounded by a corona of tentacles.

Monitoring equipment at Frio River at Concan, Tex.

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