Giant stonefly Pest Control Canada

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Jan 18, 2026

Pest Control Canada

Giant stonefly

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7249. About 3 inches long. Sitting under a light in bedroom. Very veiny back. July 3. Coldwater, On. Canada

Number 7249. This is a giant stonefly (Plecoptera: Pteronarcidae). These are harmless insects whose aquatic immature stages form an important part of the freshwater food. Giant Stonefly Additional Information