Citizen Science: Theory and Practice is an open-access, peer-reviewed journal published by Ubiquity Press on behalf of the Citizen Science Association. The journal focuses on advancing the global field of citizen science by providing a venue for citizen science researchers and practitioners to share best practices in conceiving, developing, implementing, evaluating, and sustaining projects that facilitate public participation in scientific endeavors in any discipline. Authors include scientists, educators, community organizers, information technologists, conservation biologists, evaluators, land-use planners, and more. Readers include anyone interested in understanding and improving practice of the growing citizen science field. As an open-access journal no fees are charged to view any part of the journal, which is supported by nominal author's fees.