Examples of valuable raw contents of Czech bird inventories that were published during the 20^th century in local journals and white papers. a Some published inventories come with detailed maps of surveyed areas, sometimes with complex sampling designs, such as the points located along a transect within a polygon (Kloubec and Klimeš 1995); b Some publications contain photographs of the surveyed habitats, which can be used to extract information about percentage of land-cover types, such as forest, something that we have implemented here in SPARSE; c Examples of how species composition across sites is presented in different publications. This varies from barely legible and loosely structured typewriter texts to well organised spreadsheets.