The 20th annual Great Backyard Bird Count (GBBC) is taking place February 17 to 20 in backyards, parks, nature centers, on hiking trails, school grounds, balconies, and beaches — anywhere you find birds.

Bird watchers count the birds they see for at least 15 minutes on one or more days of the count, then enter their checklists at birdcount.org. All the data contribute to a snapshot of bird distribution and help scientists see changes over the past 20 years.

Varying weather conditions so far this winter are producing a few trends that GBBC participants can watch for during the count. eBird reports show many more waterfowl and kingfishers remaining further north than usual because they are finding open water. If that changes, these birds could move southward.

In addition to counting birds, the GBBC also holds a photo contest. For the 20th anniversary of the GBBC, the public is invited to vote for their favorite top photo from each of the past 11 years in a special album they will find on the GBBC website home page. Voting takes place during the four days of the GBBC.

Learn more about how to take part in the Great Backyard Bird Count here, where downloadable instructions and an explanatory PowerPoint are available. The GBBC is a joint project of the Cornell Lab of Ornithology and the National Audubon Society with partner Bird Studies Canada and is made possible in part by sponsor Wild Birds Unlimited.

Photo by Ann Foster, Florida, 2016 GBBC.