Claassenia Stonefly vs Southern Salmonfly

Side-by-side species comparison

Claassenia Stonefly

A large predatory stonefly with a mottled yellow and brown pattern. The nymphs are active nocturnal hunters that roam the stream bed seeking prey.

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Nymphs often crawl out of the water at night to hunt, making them vulnerable to bats and spiders.

A medium-sized stonefly of warm southeastern streams with nocturnal adults. Nymphs are active predators in gravel substrates.

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Adults are strongly attracted to lights and are often collected far from water at night.