Great Backyard Bird Count

Great(Global) Backyard Bird Count (GBBC) is citizen science project in ornithology. It is conducted annually in mid February. This event it supported by Cornell Lab of Ornithology and National Audubon Society. During this four day event birdwatchers all around the world are invited to count and report details of birds in the area they live. This data is logged at ebird.org server in specific format. The rich data collected during this event is used for scientific research.