Bird Cams Lab was a project funded by the National Science Foundation that ran from 2018 to 2021, providing opportunities for the public to work with scientists to co-create scientific investigations using online wildlife cams. Participants had the opportunity to be a part of each stage of the scientific process: making observations,posing questions to investigate, designing the study, collecting data, exploring results, and sharing findings. There were six investigations, and a total of more than 500,000 observations. Participants collected data from archived video footage on the Zooniverse platform, and in real time using a data tagging tool on the Bird Cams Lab and Bird Cams website. The data are intended to be open access and we encourage anyone to use the information to explore or conduct research. We have organized the data for each investigation in its own folder. When using the data, please acknowledge the contributions and funding under Acknowledgements and use the suggested citation. To learn more about the Bird Cams Lab project, visit https://birdcamslab.allaboutbirds.org/. To access the code used to work with this data, visit https://bitbucket.org/cornellbirds/bcl-data-workflow/src/live/.For any questions about the data, please contact Bird Cams (birdcams@cornell.edu).