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Red Lists assess the extinction risk of species and are an important tool to prioritise species conservation and management measures. Worldwide, quantitative IUCN criteria are used to estimate the threat status of species at the regional level.In Flanders (north Belgium), about 70 000 distribution records of ladybirds were collected in 36% of all the grid cells (1 × 1 km2) since 1990 during a large‐scale...