According to historical data from entomological collections, the swamp darner (Epiaeschna heros) was more frequent in Québec in the past. The specimen caught on June 24, 2013 at Lac-Brome, in the Montérégie region, was the first individual of this species to be record in the province for 25 years. In Québec, human activity has resulted in the loss and perturbation of the forest-shaded temporary pools and fluvial swamps favoured by this species, which means that the swamp darner is now rare and potentially vulnerable in the province.