Remains of chironomid subfossils, a type of insects similar to mosquitoes, were used to reconstruct the temperature of the Iberian Peninsula in the Holocene, the geological period that goes from 11,000 years ago until now. The results of the study demonstrate some of the climate patterns of the Holocene brought by other methodologies: a rise of temperatures in the beginning and the end of the period, higher temperatures during the Holocene Climate Optimum and a decline of temperatures after the beginning of the Late Holocene.