Images

Pictographs at Saguaro National Park. Photographed 2006 or earlier

Pictographs at Saguaro National Park. Photographed 2006 or earlier.

A Cascades frog perched on moss.

USGS researchers Brome McCreary (orange vest) and Chris Pearl take measurements on Cascades frog at a mountain lake in Oregon.

A USGS scientist holds a five-year-old stocked lake sturgeon recaptured during a survival assessment in the Genesee River, New York.

Clouds Overlying a Forest.

A Cascades frog peeks out of the water in Olympic National Park.

Forest cover being removed for cattle pasturage and development. Smoke from bulldozed trees is visible in background with cattle in the foreground.

Larval Pacific lamprey collected from the upper Umatilla River in northeastern Oregon.

A rare Yosemite bog-orchid (Platanthera yosemitensis) was identified as a new species in 2007.

A photomicrograph depicting the siliceous tests of ten species of marine radiolarians. This image has been inverted to bring out details. Upon death, their tests can form siliceous marine sediments known as radiolarian ooze.

Photomicrograph depicting the siliceous frustules of fifty species of diatoms arranged within a circular shape. Diatoms form the base of many marine and aquatic food chains and upon death, their glassy frustules form sediments known as diatomaceous earth.

Deer in the mist by Lunch Lake in the Seven Lakes Basin of Olympic National Park.

An unknown hybrid species of salamander captured in Olympic National Park, Washington.

Snakehead fish are originally from China and Korea, but recently they've been found in Maryland, Virginia, Arkansas, California, and Florida.

Erik Hofmeister, NWHC veterinarian and research scientist, holds a zebra finch, a species which serves as a laboratory model for study of avian diseases.

Elk traveling on winter range in the northwestern Greater Yellowstone Ecosystem after crossing the Madison River near Ennis, Montana, 2008.

Elk traveling across winter range in the northwestern Greater Yellowstone Ecosystem near the Gardiner River in Yellowstone National Park, 2008.

Researchers with IGBST have tranquilized the bear and prepare to lift it out of the trap and onto the tarp for data collection. Once on the tarp the bear is easier to move.

The kerchief over the bear's eyes protects it from dust and debris and reduces visual stimulation. The small tubing in its nose, known as a nasal cannula, delivers oxygen to the animal while it is tranquilized.

Whitish areas on this diseased sunflower sea star (Pycnopodia helianthoides) are lesions that result in detachment of arms from the central disc.