Images

Example of a brown treesnake (Boiga irregularis) wrapped around two wires. This image is an example of how adult brown treesnakes can bridge power lines and cause power outages. The brown treesnake is an arboreal invasive species on Guam where researchers have discovered electrocuted snakes on power lines and at substations.

A group of controlled Culex mosquito eggs are viewed under a microscope in a California laboratory as part of an effort to mitigate avian malaria throughout the Hawaiian Islands. Image by Mia Takai 

Researchers identified plants along a transect at a site invaded by cheatgrass at Kuna Butte near Caldwell, Idaho. 

One of many stream gages in the Klamath Basin. Solar charged batteries keep the data coming in through the satellite network. View the data.

Looking east on Bullgate Pond at sunrise with lone tule white-fronted goose (Anser albifrons elgasi) in upper right, Summer Lake Wildlife Area, near Summer Lake, Oregon.

Looking up river on the North Santiam in Gates, Oregon. The small metal box houses stream monitoring telemetry equipment. 

A YSI Sontek M9 acoustic doppler current profiler (ADCP) measures the flow along the Sevenmile Canal. The Sevenmile Canal is a tributary to Upper Klamath Lake.

A major advancement in the use of radio telemetry has been the development of automated radio tracking systems (ARTS) which allow animal movements to be tracked continuously. A new ARTS approach is the use of a network of simple radio receivers (nodes) that collect radio signal strength (RSS) values from animal-borne radio transmitters.

Lahontan cutthroat trout (Oncorhynchus clarkii henshawi) is a federally listed threatened species. Ninety-seven percent of their range are small headwater streams in the Great Basin of North America.

Researchers instruct volunteers on how to collect dragonfly larvae in Glacier NP as a part of the Dragonfly Mercury Project.

Clear weather allowed HVO geologists to make observations and take measurements of the water pond at Kīlauea's summit. No major changes were observed, and the water level continues to slowly rise. Note the former HVO observation tower can be seen above the geologist's helmet. 

The sampling mechanism (on blue tarp) is prepared and the Unoccupied Aircraft System (UAS) is inspected just before take off to collect water from the Halema‘uma‘u crater lake. Brightly colored flagging tape tied to a cable attached to the UAS indicated depth as the sampling tool was lowered into the water. 

A close-up view of the Kilauea pond shows the color variations across the surface, and sharp boundaries among zones of different color.

After a sample was collected, HVO team members transferred water from the sampling device to plastic bottles. Team members took notes, measured water pH and evaluated water temperature data for each sample collected.   

A RiverPro acoustic doppler current profiler (ADCP) is propped in the snow near the Klamath River in Keno, Oregon. The ADCP is used to measure streamflow.

Water collected from the lake at the bottom of Halema‘uma‘u is prepared for laboratory analyses at the USGS California Volcano Observatory. Results thus far reveal chemistry indicative of complex reactions among the water, magmatic gases and Kīlauea's basaltic rocks. 

The sampling mechanism (on blue tarp) is prepared and the Unoccupied Aircraft System (UAS) is inspected just before take off to collect water from the Halema‘uma‘u crater lake. Brightly colored flagging tape tied to a cable attached to the UAS indicated depth as the sampling tool was lowered into the water. 

USGS-HVO scientists and DOI UAS team members collect samples of water from the Halema‘uma‘u crater lake. 

Stakeholder interests have spurred the reintroduction of the critically endangered populations of Chinook Salmon to tributaries upstream of Shasta Dam, in northern California. We released two groups of acoustically tagged, juvenile hatchery, late-fall Chinook Salmon to determine how juvenile salmon would distribute and survive.

The Snake River is the largest tributary of the Columbia River. It drains over 108,000 square miles in mainly Idaho and portions of Montana, Nevada, Oregon, Washington, and Wyoming. The climate of much of the Snake River watershed is arid or semi-arid and spring snowmelt contributes substantially to the river’s flow.

Bathymetric the islands and seamounts that make up the Mariana volcanic island arc (left) and the area of Ahyi seamount in the northern part of the arc (right). Susan Merle of NOAA's Earth-Ocean Interaction Program created these maps.