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The Great Backyard Bird Count takes place every year over four days in mid-February throughout the United States and Canada. Volunteers of all ages and experience, known as “citizen scientists,” spend at least 15 minutes counting birds from any location. Then they report the number of birds and species they have seen via the Internet. This gives scientists a real-time portrait of which birds are where in North America. The event was launched in 1998 by the National Audubon Society and the Cornell University Ornithology Lab. Discuss
Source: The Free Dictionary