Okanagana rimosa is a common cicada in habitats in Northern Michigan including areas close to the Biological Station. Its population of severely affected by a parasitic fungus and a parasitic fly. Long term data (see graphic) show, that the fungus infection is openly visible later in season, probably due to competition of the parasitic fly. The fungal infection will be studied in respect to other infections and spreading of the fungus between individuals. The data are also a basis for models of population biology in a multiple parasite-host system. Such models are important for understanding long term changes, also in respect to climate change und the evolution of the biological systems. Additionally, the acoustic behaviour will be analysed with an acoustic camera. By using the camera sound sources can be identified in a habitat. The data will therefore allow to study the timing of sound production in a chorus of cicadas. Are all cicadas simultaneously active and is such a chorus attractive for females? Or do females (and parasites!) have difficulties to identify single sender in a chorus? Do silent males exist, which thereby might escape parasitation? The data will be important to understand the interaction between host and parasite.