Building California's First Statewide Breeding Bird Atlas

Van Pierszalowski

Tue, Nov 04, 2025 7:00 PM

Join Van and others from the team at California Bird Atlas to learn more about the upcoming launch of California’s first statewide Breeding Bird Atlas - an initiative already completed in 44 other states. While California has traditionally conducted Atlases at the county level, only 15 of the state’s 58 counties have published them, representing less than 17% of the state’s land area. Furthermore, 14 of these 15 counties are either coastal or adjacent to the San Francisco Bay Estuary - underscoring an extreme bias towards densely populated regions. Today, powerful data platforms like eBird and a statewide surge in birdwatching participation have finally made a comprehensive Atlas for all of California possible.

The livestream can be found at our YouTube channel.