View the history and overview of Audubon's Annual Christmas Bird Count. This first citizen science program has run for over 100 years and is still growing. Produced, directed, filmed and edited by Holly Davis as part of a project for a film course at Duke University.

http://birds.audubon.org/videos/audubons-christmas-bird-count

Audubon's Christmas Bird Count - Tallying the birds of the Americas for over a century

http://birds.audubon.org/videos/audubons-christmas-bird-count-tallying-birds-americas-over-century