California Bird Atlas Big Weekend is a four-day statewide celebration of birds and the California Bird Atlas project that launched this year. During this weekend, birders across the state will help document the bird species that are breeding this spring.

ESBA is hosting a field trip on Saturday, June 6 in the Lee Vining area—see our other calendar entry.

To contribute to the Atlas, all you need to do is join the project on eBird and add your observations of bird breeding behaviors to your checklists. Read more about how to get started here.

Already part of the Atlas project and want to see the progress so far? Check out this map! (Hint: click on the stack of squares to switch to the satellite or street base map.) Or use the Explore page on the Atlas eBird site.

Statewide info about Big Weekend here.