Great Backyard Bird Count

The Great Backyard Bird Count (GBBC) is a community science project in ornithology.

During this four-day event, birdwatchers around the world are invited to count and report details of birds in the area in which they live.

Data collected is submitted in eBird an online web interface, and compiled for use in scientific research.

[1][2] The GBBC was the first community science project to collect bird sightings online and display results in near real-time.

[9] Data collected during the event is subjected to verification by experts, in order to overcome potential shortcomings in the abilities of amateur participants.