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Photomicrographs from the lung of an eastern gray squirrel (Sciurus carolinensis) found dead in Wisconsin, U.S.A. (A) A bronchiole (arrow) contains numerous neutrophils. H&E stain. Inset: Bronchiolar epithelium is overlain by Gram-negative bacteria. Brown and Hopps stain. Bar = 20 µm.

Justin Birchler, Physical Scientist with the USGS Coastal Change Hazards team conducts a beach profile survey at our field site on Madeira Beach. During these surveys, Justin wears a backpack with GPS equipment to collect elevation data that will be used to create a topographic map of the beach.

This photo is the results of processing a time series of images, which are a combination of all image frames collected during a 10 to 17-minute video. These images are incredibly useful for studying coastal change remotely, but the usefulness of the image depends on how they are processed.

Pole Bridge Creek is one of the sites investigated in the USGS Regional Stream Quality Assessment, during which water quality and ecological condition were sampled.

The USGS Coastal Change Hazards team collects data to monitor coastal change – including how storms and waves shape and reshape our beaches. It’s important to keep track of how beaches change over time because they provide habitat for many creatures including birds and sea turtles, and they are beautiful locations where people love to live and vacation.

In September 2020, field crews in the USGS Nevada Water Science Center measured spring flow and collected water-quality samples at locations around the Soldier Meadows Spring Complex in Nevada. The spring complex is the only home of a small fish called the desert dace.

Shields River above Smith Creek near Wilsall, MT (06192980)

The USGS Landsat Archive added its 9 millionth scene to the archive on September 18, 2020. The scene was acquired by Landsat 8 over Northern Paraguay and is shown using bands 6,5,4.

We conduct fieldwork in a variety of barrier island settings to understand the relative importance of these factors, including Fire Island, NY; Rockaway, NY; Seven Mile Island, NJ; and Cedar Island, VA.

Color variations are common at Kīlauea's summit water lake, and are usually dominated by tan and brown hues. Today, the interaction between different color zones produced a large swirl in the center of the lake.

Throughout the historically active 2020 Atlantic Hurricane Season,USGS hydrologists have been working quickly to collect vital flood and streamflow information in impacted areas.

Using a portable flume to measure streamflow, Dugout Creek MT

Cableway (foreground) and stream gage (background) on Blue River at Blue River, Oregon (Site number 14162200)

Map of the USGS Hawaiian Volcano Observatory’s current camera network coverage.   Lava-flow hazard zone 1 is outlined in yellow.   Color-shaded areas are visible to at least one camera in the current network.  We would like to expand the network so that it covers the grey-shaded areas in zone 1 as well.  If your property has a good view

USGS Hydrologic Technician assisting with collection of downwelling porewater samples in a PFAS-impacted lake on Cape Cod.