Great Backyard Bird Count Start Date: Immediately End Date: February 18, 2019 Great Backyard Bird Count Take part in a citizen science project without leaving your yard. The Great Backyard Bird Count, February 15 – 18 is organized by the Cornell Lab of Ornithology. It’s easy to participate. Just choose a day and register your location on birdcount.org or eBird.org. The data that you collect and share helps scientists to understand how environmental changes affect bird species. It’s science fun for the whole family. Texas Parks and Wildlife Reminds you that Life’s Better Outside.