Project FeederWatch
Project FeederWatch is a North American citizen science project in ornithology supported by the Cornell Lab of Ornithology and Birds Canada. The FeederWatch season begins November 1 and runs through April 30. Participants count birds that visit backyards, community areas, and other locales, with bird feeders often used but not required for participation. Data is submitted online at the Project FeederWatch website or through its mobile app.
Text from Wikipedia, CC BY-SA 4.0

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