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.
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.
While Swainson’s Hawks are the primary species observed, other raptors spotted during migration include:
On peak migration days, it is possible to see hundreds of hawks soaring together in swirling formations known as “kettles.”
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.
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.
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