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Male and female pintail ducks at the water's edge
Hen and drake northern pintail at Colusa NWR
Hen and drake northern pintail at Colusa NWR
Hen and drake northern pintail at Colusa NWR

Hen and drake northern pintail at Colusa National Wildlife Refuge

Flock of white geese with dark wingtips in flight
Ross’s Goose flight at Colusa NWR
Ross’s Goose flight at Colusa NWR
Flock of white geese at the water's edge with a few ducks
Ross’s Geese on levee at Colusa NWR
Ross’s Geese on levee at Colusa NWR
Ross’s Geese on levee at Colusa NWR

Ross’s Geese (and a few ducks) on levee at Colusa National Wildlife Refuge

Learn more about USGS goose and duck research here.

Brown geese with white faces and a few ducks on the edge of a wetland
Greater White-fronted Geese with Pintail and Mallards at Colusa NWR
Greater White-fronted Geese with Pintail and Mallards at Colusa NWR
Greater White-fronted Geese with Pintail and Mallards at Colusa NWR

Flock of Greater White-fronted Geese with Pintail and Mallards at Colusa National Wildlife Refuge

Learn more about USGS goose and duck research here.

Flock of 13 geese in flight
A flock of Aleutian cackling geese at San Joaquin River NWR
A flock of Aleutian cackling geese at San Joaquin River NWR
A flock of Aleutian cackling geese at San Joaquin River NWR

A flock of Aleutian cackling geese at San Joaquin River National Wildlife Refuge.

Two pintail ducks, one with a dark head, light neck, and grey body, one brown with a pattern, both swimming
Hen and drake northern pintail at Colusa NWR
Hen and drake northern pintail at Colusa NWR
Hen and drake northern pintail at Colusa NWR

Hen and drake northern pintail at Colusa National Wildlife Refuge

3 pintail ducks swimming in the center, two others off to the sides
Northern pintail drakes at Colusa NWR
Northern pintail drakes at Colusa NWR
Northern pintail drakes at Colusa NWR

Northern pintail drakes at Colusa National Wildlife Refuge

Nine brown geese with white faces on the water, one with its head in the water
Greater White-fronted Geese at Colusa NWR
Greater White-fronted Geese at Colusa NWR
A marten (weasel like mammal) walks under a wooden underpass
Sierra marten caught on camera using underpass in Sierra NF
Sierra marten caught on camera using underpass in Sierra NF
Sierra marten caught on camera using underpass in Sierra NF

A Sierra Marten (Martes caurina sierra) caught on wildlife camera in October 2019 passing beneath an elevated road segment built to study usage of the underpass by the Yosemite toad.

A Sierra Marten (Martes caurina sierra) caught on wildlife camera in October 2019 passing beneath an elevated road segment built to study usage of the underpass by the Yosemite toad.

Squirrel-like animal looks up at the camera
Humboldt’s flying squirrel on wildlife camera
Humboldt’s flying squirrel on wildlife camera
Humboldt’s flying squirrel on wildlife camera

The photo features a Humboldt’s flying squirrel (Glaucomys oregonensis) caught on a wildlife camera. The camera was set up to study animal movement under a new road crossing structure known as the “toad road” in Sierra National Forest.

The photo features a Humboldt’s flying squirrel (Glaucomys oregonensis) caught on a wildlife camera. The camera was set up to study animal movement under a new road crossing structure known as the “toad road” in Sierra National Forest.

Aerial view of coast of San Miguel Island, showing kelp and California sea lions
California sea lions, San Miguel Island
California sea lions, San Miguel Island
California sea lions, San Miguel Island

California sea lions, San Miguel Island.

A marten (weasel like mammal) looks up at the camera
Sierra marten caught on camera
Sierra marten caught on camera
Sierra marten caught on camera

This Sierra Marten was caught on wildlife camera in October. The camera was set up to study animal movement under a new road crossing structure known as the “toad road” in Sierra National Forest. The Sierra marten (Martes caurina sierra) is a mammal in the weasel family about the size of a house cat.

This Sierra Marten was caught on wildlife camera in October. The camera was set up to study animal movement under a new road crossing structure known as the “toad road” in Sierra National Forest. The Sierra marten (Martes caurina sierra) is a mammal in the weasel family about the size of a house cat.

Aerial view of mixed feeding congregation of pinnipeds, porpoises, gulls, and shearwaters
Mixed feeding congregation of pinnipeds, porpoises, gulls, and shearwaters
Mixed feeding congregation of pinnipeds, porpoises, gulls, and shearwaters
Mixed feeding congregation of pinnipeds, porpoises, gulls, and shearwaters

Mixed feeding congregation of pinnipeds, porpoises, gulls, and shearwaters.