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The Connecticut Bird Atlas is a project to map all species of birds that occur in the state of Connecticut. Field work took place between April 2018 and February 2022, and involved nearly a thousand volunteer birders, who submitted more than 600,000 bird observations.

Data from the atlas are being incorporated into a new Birds of Connecticut, which we are making available to everyone on this website. Basic data analyses are complete, but the writing of species accounts is ongoing. Because we do not want to delay the release of data any longer, we are posting draft versions of species accounts now. These accounts will include the basic breeding and winter “block maps” for each species, as well as some other summary data and photographs from the atlas field work. Text and the results of additional analyses will be added to species accounts as they are completed.

Help us to review species accounts: While we are completing the species accounts, we ask that atlas volunteers who helped collect data review the block maps for errors. If you think that there are species missing from a block, please fill out this form. Note that, inclusion on the maps requires that records are from the atlas data collection period (Apr 2018 – Feb 2022), and that breeding records need to have been submitted with appropriate breeding codes and breeding “safe dates” for the species in question.

The Connecticut Bird Atlas is a joint project of the Connecticut Department of Energy and Environmental Protection Wildlife Division and the University of Connecticut. Most of the funding (85%) for this project came from the Wildlife and Sport Fish Restoration (WSFR) program, with additional funding from the Connecticut Ornithological Association, Connecticut Audubon Society, Audubon Connecticut, Great Hollow Nature Preserve and Ecological Research Center, the Community Foundation of Middlesex County, Hartford Audubon Society, Litchfield Hills Audubon, Menunketuck Audubon Chapter, New Haven Bird Club, Potopaug Bird Club, and the Western Connecticut Bird Club. The monies from WSFR come solely from hunters, fishermen, and people who purchase firearms and ammunition in the US. The project would not have been possible without the help of nearly a thousand birders who volunteered their time and field expertise.

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