The San Francisco Bay is the largest estuary in Western North America and a key link in the 4,000-mile Pacific Flyway, one of the primary migratory routes used by birds to move north and south across the continent. It’s a place where birds come to rest and refuel for their long trip, or breed and nest the next generation. But in the span of a few human generations, 90% of California’s wetlands have disappeared to development and agriculture, endangering migrating and local birds. Now drought and sea level rise are further diminishing important bird habitats. As climate change becomes a bigger threat to the Bay Area’s local and migratory birds, scientists and conservationists work to help habitats adapt to climate change to ensure bird’s futures.