This study investigates the reproductive habitat of Sympecma paedisca at Lake Constance, a region of special importance for the conservation of the species in Germany, focussing on vegetational characteristics. The reproductive activity of S. paedisca was analysed by sampling active individuals along transects, distinguishing between males, females, and tandems. Sixty-eight plots, including controls, were defined according to the S. paedisca observations, and vegetation surveys were conducted on each plot. Additionally, an analysis of the relationship between long-term S. paedisca monitoring data and the expanse of flooded reedbeds and reed meadows (i.e., traditional litter meadows used to produce bedding for the stables) was conducted. The results suggest that the reproductive habitat description for S. paedisca at Lake Constance needs to be revised. The importance of sparse P. australis vegetation for S. paedisca was highlighted and the plant community of low sedge swamps was identified as additional reproductive habitat. Overall, the results indicate that plant community composition is not the main cue for S. paedisca habitat selection. Whilst the reed meadows are significant reproductive habitats for S. paedisca, this is not the case for the reedbeds.