San Francisco Bay and Sacramento-San Joaquin Delta Estuary

Multimedia

For more than a century, USGS science has informed natural-resource management decisions in the region. Use the "Select Multimedia" filter below to isolate the different types of visual media available for our work in the Bay and Delta, then click "Apply Filter" to view the media.

Filter Total Items: 48
Man holds a Lesser Snow Goose marked with a GPS collar
February 21, 2018

USGS biologist Jeffrey Kohl holds a Lesser Snow Goose

USGS biologist Jeffrey Kohl holds a Lesser Snow Goose marked with a GSM/GPS solar-powered neck collar.

View from a boat of a man snorkeling in a marshy waterway with thick vegetation along the edge of and in the water.
April 5, 2017

Brazilian waterweed

Tips of Brazilian waterweed (Egeria densa) break the surface at low tide in Lindsey Slough in the northern Sacramento-San Joaquin River Delta. More commonly, this invasive plant is completely submerged.

Two women stand together smiling on a boat wearing life jackets and sun hats with other safety gear.
March 27, 2018

Fieldwork in the Delta

Shruti Khanna (left, California Department of Fish and Wildlife) and Judy Drexler (USGS California Water Science Center) on the USGS Pacific Coastal and Marine Science Center’s research vessel Parke Snavely during fieldwork in the Sacramento-San Joaquin River Delta.

Woman looks through a spotting scope at the ocean
July 17, 2019

Conducting a high tide waterbird survey on San Fransisco Bay

San Francisco Bay and the surrounding wetlands and ponds provide important habitat for waterfowl and shorebirds. To aid land and resource managers in tracking wildlife responses to habitat restoration efforts, Biological Science Technician, Aliya, conducts a high tide waterbird survey of a restored salt pond in the Napa-Sonoma Marshes Wildlife Area at the northern edge of

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Black and white outline of snake coiled up on a duck nest, with its mouth around an egg
June 20, 2019

Coloring Sheet: Gopher Snake Attempts to Eat a Duck Egg

A PDF copy of a coloring sheet showing a gopher snake attempting to eat a duck egg in a nest, based on an image taken in Suisun Marsh, California.

Black and white outline of man holding a duckling with a transmitter on its back
June 20, 2019

Coloring Sheet: Duckling With Transmitter

A PDF copy of a coloring sheet showing a USGS scientist holding a mallard duckling with a transmitter attached to its back, based on an image taken in Suisun Marsh, California.

A small boat sits on calm waters with trees in the distance, and a cloudy sky.
March 14, 2018

Mokelumne River survey

Mokelumne River near confluence with the San Joaquin River in the Sacramento-San Joaquin Delta, CA, looking downstream, with Cordell Johnson (USGS PCMSC) and Rachel Allen (USGS PCMSC) collecting data from the R/V Fast Eddy.

A small boat sits on calm waters with trees in the distance, and a cloudy sky.
March 14, 2018

Mokelumne River survey

Mokelumne River near confluence with the San Joaquin River in the Sacramento-San Joaquin Delta, CA, looking downstream, with Cordell Johnson (USGS PCMSC) and Rachel Allen (USGS PCMSC) collecting data from the R/V Fast Eddy.

A woman and a man stand on the stern of a boat wearing safety gear, man is pressing on a piece of equipment.
March 19, 2018

Gomex sediment corer preparation

Dan Powers (USGS PCMSC) and Rachel Marcuson (USGS PCMSC) prepare to deploy a Gomex sediment corer from the R/V Snavely in the Mokulumne River near confluence of San Joaquin River in the Sacramento-San Joaquin Delta, CA.

View from the sky of a landscape with a river running through it, and the river is winding back and forth.

Mokelumne River Bathymetry

A winding strip of rainbow colors shows the bathymetry (depth) of the bed of the Mokelumne River just above its confluence with the San Joaquin in the Sacramento-San Joaquin River Delta east of San Francisco Bay. USGS scientists mapped the channel as part of a project to

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marsh
February 13, 2018

Egret Flyover, Petaluma River

While heading out to a survey plot off of San Pablo Bay, an egret flies over the Petaluma River in the early morning.

collecting Ducks
July 26, 2017

Two Scientists Collecting Ducks

Researchers use wire mesh to construct traps for collecting waterfowl in Suisun Marsh, CA.