A stonefly nymph. Stoneflies are good indicators of healthy water. Photo by Bohringer Friedrich: https://en.wikipedia.org/wiki/Plecoptera#/media/File:SteinfliegenLarve2.JPG
A stonefly nymph. Photo by Bohringer Friedrich
A stonefly nymph. Stoneflies are good indicators of healthy water. Photo by Bohringer Friedrich: https://en.wikipedia.org/wiki/Plecoptera#/media/File:SteinfliegenLarve2.JPG
New York State Parks and Historic Sites Blog 
