Sweltsa Green Stonefly vs Northern Ground Beetle

Side-by-side species comparison

Attribute	Sweltsa Green Stonefly	Northern Ground Beetle
Scientific Name	Sweltsa borealis	Pelophila borealis
Order	Plecoptera	Coleoptera
Family	Chloroperlidae	Carabidae
Size	6-9 mm	10-14 mm
Habitat	Forests	Tundra & Arctic
Diet	Predators	Predators
Regions	North America	Scandinavia, Finland, northern Russia, Siberia, Arctic Canada, Alaska
Conservation	Least Concern	Least Concern

Sweltsa Green Stonefly

A small northern green stonefly found in cold boreal and montane streams. Nymphs prey on early-instar chironomids and other tiny larvae.

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Did You Know?

This species is one of the most cold-adapted stoneflies and can be active in near-freezing water.

Northern Ground Beetle

A medium-sized, dark metallic green or bronze ground beetle with long legs. It is an active predator on riverbanks and lakeshores in Arctic regions. Adults run rapidly across muddy substrates hunting small invertebrates.

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Did You Know?

This beetle can withstand brief submersion in near-freezing water and quickly resumes hunting once it reaches dry ground.