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View of lake at Fernhill Natural Treatment Wetlands.

Two Common Murre chicks on rock ledge at Gull Island, Alaska.

USGS staff electrofishing in a headwater stream in New York

Still frame from a webcam set up at USGS Streamgage 01463500 Delaware River at Trenton NJ. This image was taken on August 19, 2019 at 4:00 pm local time.

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YVO scientist showing a GPS receiver and monitoring station in Yellowstone Natio

Old Faithful geyser visitor center, and visitor facilities as viewed from Observation point on August 18, 2019.

Old Faithful Geyser, as well as Old Faithful Inn and the Yellowstone National Park visitor center, as viewed from the lookout on Observation Point trail.

Water pond in Halema‘uma‘u August 18, 2019. The water level continues to slowly rise in Halema‘uma‘u, drowning many of the small rocks that were previously exposed in the center of the pond. Ripples across the water surface were evident today.

Arctic grayling (Thymallus arcticus) and Dolly varden (Salvelinus malma)  from impounded water of beaver dam on the Wrench Creek, Noatak National Preserve. 

Measuring temperature and dissolved oxygen in impounded water of beaver dam on the Wrench Creek, Noatak National Preserve.

Gnawed tree from beaver activity on tributary of the Agashashok River, Noatak National Preserve

Beaver dam crossing mainstem of Rabbit Creek near the headwaters, Cape Krusenstern National Monument

Beaver dams on Rabbit Creek, Cape Krusenstern National Monument

This video sequence begins with a close-up of the fumaroles on the north side of Halema‘uma‘u, then widens to show a broader view of the crater, with the water pond at the bottom. The video then shows a close-up of the water surface, with steaming and ripples.

Before deploying the subbottom profiler for leg 2 of the Cape Cod Bay 2019 Survey, Wayne Baldwin, Alex Nichols, and Chuck Worley made sure that the floats are sufficiently inflated. In the relatively shallow waters of Cape Cod Bay we want the instrument towed at water's surface for the resolution of the sub seafloor geology.

USGS members of the science party on board R/V Rachel Carson prepare the hydrophone streamer for deployment.

A near-vertical view into Halema‘uma‘u, with the water pond at the bottom still in the shadow of early morning. USGS photo by D. Becker.

Photomicrographs from a Zebra Finch (Taeniopygia guttata) from a California aviary that was found dead. (A) Numerous yeasts are present in the lumen (*) of the proventriculus. H&E stain. (B)  The yeasts are 2 x 40 um, basophilic, rod-shaped and occur in stacks. H&E stain.

(A) Photomicrograph from a Herring Gull (Larus argentatus) from Wisconsin shows a normal thyroid gland for comparison.  Within the thyroid gland there are variably-sized follicles filled lined by cuboidal epithelium (arrowhead) and filled with colloid (*). H&E stain.

Beaver dams on Rabbit Creek, Cape Krusenstern National Monument