As part of the Citizen Science Network Austria (https://www.citizen-science.at/netzwerk), the working group Open Biodiversity Databases in Citizen Science Projects was established in February 2018. The objectives of this working group are (I) to formulate a catalogue of questions to help deciding about open publishing of research data collected in a citizen science biodiversity project, (II) to accompany and document the process of open publishing of research data from a concrete project and (III) to write and publish a so-called data paper in addition to publishing research results. This document is the product of point (I) of the objectives, the questionnaire.