Christmas Bird Counts for 2020 - 2021

a winter tradition

The Christmas Bird Count began in 1900 when Frank Chapman suggested that teams change their tradition of shooting birds as a Christmas sport to simply taking a census of them. In the ensuing years, the idea has grown and the CBC has become a winter tradition for many birders across the country with friendly competitions among states and even circles. As the first citizen science project, the CBC has captured enough data over the years that results are now used by various scientific organizations to document changes in bird populations. For more history and a neat video, check out the National Audubon's page on the CBC history. Don't forget to add your count information the the IOU calendar.

All CBC counts must be held during one calendar day during the period of 14 December to 5 January. These are the CBC dates for this season. Click the Select button to see the details.

The following documents may be downloaded and used for your count:

 CBC Report Form  CBC Species List  CBC Species Detail
View results from previous CBCs or check Iowa Bird Life for a summary of Iowa's season.   

Northeast Madison County CBC12/17/2020
Cedar Rapids Count12/19/2020
Ames Christmas Bird Count12/19/2020
Lake Rathbun CBC12/19/2020
Red Rock Christmas Bird Count12/19/2020
Bremer County12/19/2020
Cedar Falls - Waterloo12/20/2020
Saylorville Reservoir12/20/2020
Western Mercer County12/21/2020
Buchanan County12/25/2020
North Linn Count12/26/2020
Des Moines12/26/2020
Humboldt Christmas Bird Count12/28/2020
Dunbar Slough CBC1/1/2021
Sac County CBC 1/3/2021
Northwest Clayton County1/4/2021
Union Slough Christmas Bird Count1/4/2021
Southeast Clayton County1/5/2021
Carroll CBC1/5/2021