Which specific regions in California are noted areas for observing this species during passage or wintering?

Answer

The Central Valley and the desert regions of Southern California

When passing through or wintering in California, these birds might be observed in specific pockets like the Central Valley and the desert areas located in Southern California, provided marsh conditions are viable.

Which specific regions in California are noted areas for observing this species during passage or wintering?
habitatbirdwingblackbird