Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Explore images.
A soil moisture data logger buried in the ground is a specialized instrument designed to measure and record the moisture content of soil over time. Here's how it generally functions:
A soil moisture data logger buried in the ground is a specialized instrument designed to measure and record the moisture content of soil over time. Here's how it generally functions:
This is a drone photo of the bio-acoustic fish fence in the Georgiana Slough, a tributary of the Sacramento River Delta. It is used to guide fish safely out to the ocean.
This is a drone photo of the bio-acoustic fish fence in the Georgiana Slough, a tributary of the Sacramento River Delta. It is used to guide fish safely out to the ocean.
USGS streamgage at Alcatraz Island, California
San Francisco Bay a NE Shore Alcatraz Island CA - 374938122251801 https://waterdata.usgs.gov/monitoring-location/374938122251801/
USGS streamgage at Alcatraz Island, California
San Francisco Bay a NE Shore Alcatraz Island CA - 374938122251801 https://waterdata.usgs.gov/monitoring-location/374938122251801/
Three biologists capture a brown treesnake (Boiga irregularis) and record its measurements during field work on Guam. Bea Daria (center) trains Keisha Johnson (left) and Christiana Quinata (right) on the capture and processing of brown treesnakes.
Three biologists capture a brown treesnake (Boiga irregularis) and record its measurements during field work on Guam. Bea Daria (center) trains Keisha Johnson (left) and Christiana Quinata (right) on the capture and processing of brown treesnakes.
This site south of Rock Springs in Wyoming was not burned but cheatgrass has invaded the space between sagebrush shrubs.
This site south of Rock Springs in Wyoming was not burned but cheatgrass has invaded the space between sagebrush shrubs.
This site was burned but not invaded by exotic annual grasses. Many perennial bunchgrasses were present before the fire and were able to recover quickly afterwards.
This site was burned but not invaded by exotic annual grasses. Many perennial bunchgrasses were present before the fire and were able to recover quickly afterwards.
Cheatgrass has invaded the space between sagebrush shrubs on this landscape south of Rock Springs in Wyoming.
Cheatgrass has invaded the space between sagebrush shrubs on this landscape south of Rock Springs in Wyoming.
This landscape south of Rock Springs, Wyoming was burned and subsequently invaded by cheatgrass. Cheatgrass has a short growing season and leaves behind mats of dry, dead material that serves as wildfire fuel--contributing to a cycle of more frequent and larger wildfires and more plant invasions.
This landscape south of Rock Springs, Wyoming was burned and subsequently invaded by cheatgrass. Cheatgrass has a short growing season and leaves behind mats of dry, dead material that serves as wildfire fuel--contributing to a cycle of more frequent and larger wildfires and more plant invasions.
This landscape in Rabbit Valley in Colorado was burned and then invaded by the exotic annual grass cheatgrass. A formerly diverse plant community was replaced by a sea of highly flammable grass.
This landscape in Rabbit Valley in Colorado was burned and then invaded by the exotic annual grass cheatgrass. A formerly diverse plant community was replaced by a sea of highly flammable grass.
A Project ROAM (Rapid and Other Methods for Assessment and Monitoring) crew collecting vegetation data at a complex plot with over 40 unique species.
A Project ROAM (Rapid and Other Methods for Assessment and Monitoring) crew collecting vegetation data at a complex plot with over 40 unique species.
This site south of Rock Springs in Wyoming represents an intact sagebrush ecosystem. It has not been burned or invaded by exotic annual grasses. Undisturbed sagebrush steppe has bare ground between shrubs which helps to limit the spread of wildfire. When cheatgrass invades fires can grow larger.
This site south of Rock Springs in Wyoming represents an intact sagebrush ecosystem. It has not been burned or invaded by exotic annual grasses. Undisturbed sagebrush steppe has bare ground between shrubs which helps to limit the spread of wildfire. When cheatgrass invades fires can grow larger.
A summit eruption of Kīlauea volcano, within Halemaʻumaʻu crater, began at approximately 4:44 a.m. on June 7, 2023. Lava is flowing on the crater floor and there are several active vent sources. The eruption at Kīlauea’s summit is occurring within a closed area of Hawai'i Volcanoes National Park and high levels of volcanic gas are the primary hazard of concern.
A summit eruption of Kīlauea volcano, within Halemaʻumaʻu crater, began at approximately 4:44 a.m. on June 7, 2023. Lava is flowing on the crater floor and there are several active vent sources. The eruption at Kīlauea’s summit is occurring within a closed area of Hawai'i Volcanoes National Park and high levels of volcanic gas are the primary hazard of concern.
A summit eruption of Kīlauea volcano, within Halemaʻumaʻu crater, began at approximately 4:44 a.m. on June 7, 2023. Lava is flowing on the crater floor and there are several active vent sources. The eruption at Kīlauea’s summit is occurring within a closed area of Hawai'i Volcanoes National Park and high levels of volcanic gas are the primary hazard of concern.
A summit eruption of Kīlauea volcano, within Halemaʻumaʻu crater, began at approximately 4:44 a.m. on June 7, 2023. Lava is flowing on the crater floor and there are several active vent sources. The eruption at Kīlauea’s summit is occurring within a closed area of Hawai'i Volcanoes National Park and high levels of volcanic gas are the primary hazard of concern.
A quadcopter drone rests on the orange landing pad, ready to fly over Rapid and Other Methods for Assessment and Monitoring (ROAM) plots to collect data that will be used to generate cover and density estimates.
A quadcopter drone rests on the orange landing pad, ready to fly over Rapid and Other Methods for Assessment and Monitoring (ROAM) plots to collect data that will be used to generate cover and density estimates.
A large quadcopter drone rests on the tailgate of a truck waiting to fly with hyperspectral imagery to estimate vegetation cover.
A large quadcopter drone rests on the tailgate of a truck waiting to fly with hyperspectral imagery to estimate vegetation cover.
Smallmouth Bass are good indicators of methylmercury exposure to humans and wildlife because they are a common, popular sport fish and eat a variety of food during their lifetime. Juvenile Smallmouth Bass – smaller than 150mm in length - eat zooplankton, or microscopic animals.
Smallmouth Bass are good indicators of methylmercury exposure to humans and wildlife because they are a common, popular sport fish and eat a variety of food during their lifetime. Juvenile Smallmouth Bass – smaller than 150mm in length - eat zooplankton, or microscopic animals.
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.
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
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.
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.
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 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.