Great American Bird Count

For at least 15 minutes on one or more days of the count, February 17-20, 2017, simply tally the numbers and kinds of birds you see. You can count from any location, anywhere in the world, for as long as you wish!

If you’re new to the count, or have not participated since before the 2013 merger with eBird, you must create a free online account to enter your checklists. If you already have an account, just use the same login name and password. If you have already participated in another Cornell Lab citizen-science project, you can use your existing login information, too.

Why count birds?

Scientists and bird enthusiasts can learn a lot by knowing where the birds are. Bird populations are dynamic; they are constantly in flux. No single scientist or team of scientists could hope to document and understand the complex distribution and movements of so many species in such a short time.

Scientists use information from the Great Backyard Bird Count, along with observations from other citizen-science projects, such as the Christmas Bird Count, Project FeederWatch, and eBird, to get the “big picture” about what is happening to bird populations. The longer these data are collected, the more meaningful they become in helping scientists investigate far-reaching questions, like these:

• How will the weather and climate change influence bird populations?

• Some birds, such as winter finches, appear in large numbers during some years but not others. Where are these species from year to year, and what can we learn from these patterns?

• How will the timing of birds’ migrations compare with past years?

• How are bird diseases, such as West Nile virus, affecting birds in different regions?

• What kinds of differences in bird diversity are apparent in cities versus suburban, rural, and natural areas?

The Great Backyard Bird Count is led by the Cornell Lab of Ornithology and National Audubon Society, with Bird Studies Canada and many international partners. The Great Backyard Bird Count is powered by eBird. The count is made possible in part by founding sponsor Wild Birds Unlimited.

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