The Birding Hub
The Birding Hub

Thermalito Afterbay

California · Southwest

ModerateView on eBird
Habitat
DesertChaparral
Best Seasons
FallWinterSpring
Difficulty

Moderate

Best Months

October-May

About This Location

Thermalito Afterbay is a productive birding destination in California, with 208 species recorded on eBird. This desert and chaparral habitat attracts a wide variety of species among many others. The unique desert and riparian habitats support specialty species alongside wintering and migrating birds.

Location

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Notable Species

Cactus WrenGreater RoadrunnerGambel's QuailCurve-billed ThrasherPhainopepla

Live Bird Data

Powered by eBird / Cornell Lab of Ornithology

Notable Sightings

Rare or unusual species spotted nearby in the last 14 days

California Gull

Larus californicus

3/5/2026Gray Lodge WA--Walking Loop & Parking Lot 14/Headquarters6 observed

Lesser Yellowlegs

Tringa flavipes

3/4/2026Llano Seco (viewing platform area & ponds to south)1 observed

Yellow-billed Loon

Gavia adamsii

3/3/2026Thermalito Afterbay--south levee (incl. E Hamilton & Larkin Rd)1 observed

Rufous-crowned Sparrow

Aimophila ruficeps

3/3/2026Table Mountain (BUT Co.)2 observed

American Avocet

Recurvirostra americana

3/2/2026Gray Lodge WA--Auto Loop (PL15 to PL18)3 observed

Red-necked Grebe

Podiceps grisegena

3/1/2026Thermalito Afterbay--Aythya Point (CA Atlas - Biggs CE)1 observed

Birding Tips

  1. 1

    Start birding at dawn when desert birds are most active before the heat.

  2. 2

    Check around water sources, which concentrate desert species.

  3. 3

    Carry extra water and sun protection; mornings are the prime birding window.

Amenities

Parking
Trails

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California Birding Guide

Complete guide to birding in California →

Birding Guides

The Ultimate Guide to Fall Bird Migration: Hawks, Sparrows, and Confusing Plumages

10 min read

Understanding Bird Migration: When, Where, and Why Birds Migrate

12 min read

Spring Birding in New York City: The Complete Urban Migration Guide

12 min read

Frequently Asked Questions

When is the best time to visit Thermalito Afterbay for birding?▼
The best months to visit Thermalito Afterbay for birding are October-May. The best seasons are Fall and Winter and Spring.
What birds can I see at Thermalito Afterbay?▼
Notable species at Thermalito Afterbay include Cactus Wren, Greater Roadrunner, Gambel's Quail, Curve-billed Thrasher, Phainopepla. The area supports desert, chaparral habitats.
How difficult is birding at Thermalito Afterbay?▼
Birding at Thermalito Afterbay is rated as Moderate. Some trails may require moderate fitness and basic hiking ability.
What amenities are available at Thermalito Afterbay?▼
Thermalito Afterbay offers the following amenities: Parking, Trails.