The red list of threatened thrips species (Thysanoptera, Insecta) of middle-eastern Poland

Middle-eastern Poland is a region with the best-recognised fauna of thrips in comparison with the remaining area of the country. A list of threatened thrips species (Thysanoptera, Insecta) of this region is given with 44 species divided in five extinction-risk categories. The criteria used for classification into particular categories are based on data about frequency of species occurrence, area of occupancy, fragmentation of sites and presence of their host plants. One, Thorybothrips unicolor , was classified as critically endangered, eleven species as endangered, nine as vulnerable, fifteen as species of near threatened and eight belong to the least concern group. Most of the species occur on only one locality or have a fragmented distribution, their extinction is mainly a result of the disappearance of their host plants and habitat destruction. Nine species are also mentioned on red lists of the neighbouring countries the Czech Republic and Germany. Of these only Ankothrips niezabitowskii is threatened in all three countries, yet