Vlinderdatabank - Butterflies in Flanders and the Brussels Capital Region, Belgium is a species occurrence dataset published by the Research Institute for Nature and Forest (INBO) and described in Maes et al. 2016 (https://doi.org/10.3897/zookeys.585.8019). The dataset contains over 761.000 butterfly occurrences of 70 species, compiled by the INBO in cooperation with the Butterfly working group of Natuurpunt (Vlinderwerkgroep). The occurrences are georeferenced using the centroid of their respective 5 x 5 km² Universal Transverse Mercator (UTM) grid cell and are derived from the database Vlinderdatabank at the INBO, which consists of (historical) collection and literature data (1830-2001), for which all butterfly specimens in institutional and available personal collections were digitized and all entomological and other relevant publications were checked for butterfly distribution data. It also contains observations and monitoring data for the period 1991-2014. (erratum 2021, the monitoring data is moved to ...