Yellow-Spotted Whiteface Leucorrhinia pectoralis
Local in southern and southeastern Finland. Unlike other whitefaces, favours meso- and eutrophic lakes with sedge growth. Also recorded in calm Baltic bays, where saline levels are low and there is a lot of vegetation, and has been occasionally recorded from acidic bog ponds. Common in suitable lush habitats ("bird lakes"), but quite local.
Flight period: June-August
Males are easy to identify. The spot on S8 is large and bright yellow. In older individuals, it's usually the only abdominal spot that is still clearly visible. Jussi Mäkinen