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. We have organized the 10-15-second video clips by investigation. To access the observational data, see https://doi.org/10.7298/fxqt-zw38. 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/. For any questions about the data, please contact Bird Cams (birdcams@cornell.edu).