Have you ever wanted to learn more about how birds navigate in migration? The science behind flight? We're excited to partner with the Cornell Lab's Bird Academy to offer a suite of exciting educational resources in thanks for your eBirding: on 13 May, Global Big Day, every eligible checklist that you submit gives you a chance to win free access to Ornithology: Comprehensive Bird Biology Course. This is a ~$350 value with the included e-book, and we'll have 5 copies to give away.