Known only from a few streams in Vermont: Lewis Creek and La Platte River in the Champlain Valley, and the West River upstream from its confluence with the Connecticut River. Two anomalous specimens in the University of Vermont collection are labeled from Grand Isle, but a lack of suitable habitat there raises questions about the legitimacy of the labels. Prefers low-elevation rivers with emerged rocks and a richly vegetated shoreline, both for perching sites. In New England, this species is one of our latest emerging damselflies and is possibly more widespread yet undiscovered owing to its late flight season. The known population on Lewis Creek inhabits a portion of the river that is at times treated with lampricide.
Vermont: S2S3, Species of Greatest Conservation Need
Aug 22 – Oct 4