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Ornithology Exchange

Great Backyard Bird Count

Chris Merkord

Begun in 1997, the Great Backyard Bird Count was the first citizen-science program to collect and display real-time data on bird sightings online. Today, the Great Backyard Bird Count is one of the most popular annual events among bird watchers, with nearly 100,000 checklists and more than 11 million birds reported from around the United States and Canada during the four-day period in February. As the data pour in and display on maps, web visitors can explore results from their town, state, or region—and compare patterns with those from past years. The Great Backyard Bird Count is a joint project of the Cornell Lab of Ornithology and National Audubon Society.

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