The Sacramento NWR Complex is the home to a wide variety of wildlife. Some species are seasonal while others live on the refuge year-round.
Each season brings a new look to the refuges with a variety of wildlife.
What have visitors and staff been seeing on the Complex?
Biologists conduct waterfowl surveys bimonthly September through April.
Learn more about the different types of waterfowl that visit the refuge.
A wide variety of mammals including opposums, raccoons, coyotes, skunks, river otters, beavers, muskrats, and more live on the refuge. Click here to see the Complex's Wildlife Checklist.
For Directions to the Refuges of the Sacramento NWR Complex, click on the following links:
- Sacramento NWR
- Delevan NWR
- Colusa NWR
- Sutter NWR
- Sacramento River NWR
- North Central Valley WMA - Llano Seco Unit
also check our Sacramento Valley Birding Hotspots Map (click here)
Visit the USGS's page to see Ducks at a Distance by Bob Hines. A printed copy is available at the visitor center for a small donation.
The Sacramento National Wildlife Refuge Complex is home to a number of Federal and State threatened and endangered species. Click here to see a List of Threatened and Endangered Species that occur here.
Not all animals that are found here are native. Bull frogs are not native to California and have been known to eat new born ducks and the threatened giant garter snake.
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Often small groups of northern shovelers bring food to the surface by swimming rapidly in a circle while swinging their bills side to side. They strain aquatic vegetation, plankton, and tiny invertebrates through the comblike edges of their shovel-shaped bill.