Get an eBird account: eBird is a worldwide bird checklist program used by millions of birders. It's what allows us to compile everyone's sightings into a single massive Global Big Day list—while at the same time collecting the data for scientists to use to better understand birds. Sign up here. It's 100% free.
Watch birds on 4 May: It's that simple. You don't need to be a bird expert, or go out all day long. Even 10 minutes in your backyard will help. Global Big Day runs from midnight to midnight in your local time zone. You can report birds from anywhere in the world.
Enter what you see and hear on eBird: You can enter your sightings via our website or—even easier—download the free eBird Mobile app. You can enter and submit lists while you're still out birding, and the app will even keep track of how far you've walked, so you can focus on watching birds. While you're downloading free apps, try out the Cornell Lab's Merlin Bird ID app for help with identification. Please enter sightings before 8 May to be included in our initial results announcement.
Watch the sightings roll in: During the day, keep an eye on how the lists are growing in different parts of the world. Follow along with sightings from more than 150 countries, including the Cornell Lab's Team Sapsucker in Florida, Alabama, and Texas. Stats will be updated in real-time on our Global Big Day page.