All available collection data of butterflies and moth of bogs and swamps in Mecklenburg-Western Pomerania from the literature of the past 100 years have been collected for the evaluation of spatiotemporal distribution. In addition, entomologists were interviewed. Furthermore the state-collection in the Müritzeum in Waren and the database of the State Office for the Environment, Nature Protection and Geology Mecklenburg-Western Pomerania has been evaluated. All data have been systematized and visualized by means of a Geographical Information System. Distribution maps were created. In addition, the findings of the various species were counted for each of the years. It turned out that 7 taxa of the originally spectrum (24 tyrphobiontic / tyrphophilic species) are extinct in Mecklenburg-Western Pomerania now. Important reasons for this are likely the degradation of peatlands and the large-scale changes in the regional water balance, caused of the complex drainage. Further 6 species have decreased drastically in their occurrence. It is possible that they will die out locally by further deterioration in regional water balance and by the effects of climate changes. 8 species were able to develop positively. They could increase and strengthen their population or expand their occurrence areas. On the one hand, this happens because of the success in wetland restoration, on the other hand fen species migrate into the ecosystem of bogs. 3 species have been able to establish relatively stable stocks for long periods at a low level.