Plecoptera
Guides
Zapada frigida
Frigid Forestfly
Zapada frigida is a species of spring stonefly in the family Nemouridae, commonly known as the Frigid Forestfly. Like other members of the genus Zapada, adults retain diagnostic branched cervical gills from the nymphal stage, with two sets of branched gills on each side of the body. The species has been documented from western North America including Alberta, Alaska, British Columbia, California, and Colorado.