Images

People relax on a raft floating through a calm section of the Colorado River in Grand Canyon

A river guide rows her raft through a big rapid in Grand Canyon. Muddy water suggests recent precipitation and tributary flooding along this dam-regulated section of the Colorado River.

River guide rows a raft through Grand Canyon on a Partners in Science trip with Grand Canyon Youth

A panoramic photo of Canyonlands National Park, Utah. Photo by Mike Duniway, Southwest Biological Science Center, USGS.

Active oil and gas pad on Bureau of Land Management lands near Canyonlands National Park, Utah.

A map from Federal Register, Determination of Threatened Status for the Western Distinct Population Segment of the Yellow-billed Cuckoo (Coccyzus americanus), showing the historic distribution of western yellow-billed cuckoo populations.

A Sonora Mud Turtle (Kinosternon sonoriense) basks in the sun at Montezuma Well, AZ. Kinosternon sonoriense are found only in aquatic habitats in the southwestern United States and northwestern México. They are listed on the IUCN Red List and some subspecies are listed as critically imperiled. Photo by Charles Drost, USGS, SBSC.

Researchers and Partners in Science trip participants record lengths and weights of fish captured in hoopnets along the Colorado River in Grand Canyon.

Secretary of the Interior Sally Jewell joined a Partners in Science river trip in Grand Canyon. She stands here at the Elves Chasm waterfall with trip participants, river guides, Grand Canyon Youth director Emma Wharton, and Grand Canyon Monitoring and Research Center chief Scott Vanderkooi. 

An adult caddisfly, an emergent aquatic insect. Photo by Eric Kortenhoeven, USGS.

Bighorn sheep in Grand Canyon, AZ. Photo by USGS, Southwest Biological Science Center.

Boat equipped with singlebeam sonar for mapping the bed of a river at shallow depths along the shoreline of the Colorado River.

Surveying an exposed sandbar along the bank of the Colorado River, Grand Canyon, May 2014. Photo by USGS, public domain.

Glen Canyon Dam jet tubes releasing water into the Colorado River for a high flow experiment. The increase in flow of the Colorado River downstream of the dam mobilizes sand at the bottom of the river and that sand rebuilds sandbars in Grand Canyon.

High school students observe a canyon tree frog that is climbing a canyon wall. Students were on a river trip in Grand Canyon Youth through Partners in Science, a collaboration with USGS and NPS.

Array of three single-frequency side-looking acoustic-Doppler profilers used to measure suspended-sediment concentration and grain size at the Colorado River near Grand Canyon, Arizona, gaging station.  From top to bottom: 2-MHz Nortek EasyQ, 600-kHz Nortek Aquadopp, and 1-MHz Nortek EasyQ acoustic-Doppler profilers.  Photograph taken at low water on Novem

U.S. Bureau of Reclamation works with USGS SBSC Grand Canyon Monitoring and Research Center on water quality monitoring in Lake Powell. Robert Radtke checks a line of temperature loggers deployed in Lake Powell near the dam.

Burrowing owl defense display at a desert tortoise burrow, captured during remote camera monitoring of Agassiz's desert tortoise burrows on a wind energy facility near Palm Springs, CA.

A photo of a rock wren collecting a grasshopper, captured by remote camera monitoring of Agassiz's desert tortoise burrows on a wind energy facility near Palm Springs, CA. The study, led by the USGS Southwest Biological Science Center, investigated bird use of desert tortoise burrows.

A photo of a burrowing owl defense display at an Agassiz’s desert tortoise (Gopherus agassizii) burrow. Photo taken during remote camera trap monitoring of tortoise burrows on a wind energy facility Palm Springs, California, USA. The study, led by the USGS Southwest Biological Science Center, investigated bird use of desert tortoise burrows.

Researchers monitoring sandbars on the Colorado River, in Grand Canyon National Park. USGS photo, public domain.