Audubon Christmas Bird Count 2024 2019. Since 1900, volunteer birdwatchers across the western hemisphere have surveyed birds every year between. Since its beginning more than a century ago, the christmas bird count (cbc) has relied on the dedication.

The cbc is the longest running citizen science program on earth and is coordinated by national audubon. Since 1900, volunteer birdwatchers across the western hemisphere have surveyed birds every year between.