At the southern end of its range in the eastern United States and known only from two ponds near the summit of Mt. Mansfield and from Lewis Pond in Lewis. Prefers boreal ponds or slow-running waters. Other high-elevation ponds are candidates for this species, including Sterling Pond in the Northern Green Mountains and Skyline Pond in the Breadloaf Wilderness. Warrants further investigation in Vermont.
State: S1, Species of Greatest Conservation Need
June 11 – July 2