December 6, 2021
Borrego Valley Hawkwatch: A Unique Migration Event in Borrego Springs
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Witness One of the Largest Swainson’s Hawk Migrations in North America
Each spring, Borrego Springs becomes a prime location to observe migrating Swainson’s Hawks as they travel from wintering grounds in Mexico, Colombia, and Argentina to breeding sites in North America. The Borrego Valley Hawkwatch, one of only two official hawkwatches in California, documents this annual migration, attracting birdwatchers, researchers, and nature enthusiasts.
When and Where to Observe the Migration
- Peak Migration: Mid-February through April, with the highest activity typically in mid to late March.
- Best Viewing Locations: Key observation points include Borrego Valley, Coyote Canyon, and Henderson Canyon Road.
- Time of Day: Hawks are most active in the early morning and late afternoon when they take flight from their overnight roosts.
Why Swainson’s Hawks Stop in Borrego Springs
Borrego Springs provides a critical food source for migrating hawks. After winter rains, White-lined Sphinx Moth caterpillars emerge, feeding on blooming wildflowers. The hawks stop to refuel on these caterpillars before continuing their long journey north.
What Birds Can Be Seen?
While Swainson’s Hawks are the primary species observed, other raptors spotted during migration include:
- Red-tailed Hawk
- American Kestrel
- Osprey
- White-tailed Kite
On peak migration days, it is possible to see hundreds of hawks soaring together in swirling formations known as “kettles.”
How to Get Involved
The Borrego Valley Hawkwatch is a volunteer-driven effort that tracks hawk migration trends. Volunteers are trained to count and document hawks, contributing valuable data for conservation. Both experienced and beginner birdwatchers are encouraged to participate.
Tips for Watching the Migration
- Bring binoculars or a spotting scope for a closer look.
- Check weather conditions—clear skies and warm thermals increase hawk activity.
- Visit multiple times—migration numbers fluctuate, with some days producing thousands of hawks.
- Look for local updates on peak viewing days and guided observation opportunities.
An Incredible Natural Spectacle
The Borrego Valley Hawkwatch offers a rare opportunity to witness one of North America’s most remarkable bird migrations. With thousands of hawks passing through each season, it is a must-see event for birdwatchers and nature lovers alike.
For more details on participating or viewing opportunities, visit the Borrego Valley Hawkwatch website or follow updates from local birding groups.
Learn More About Borrego Springs
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