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American Salmonfly

Pteronarcys dorsata

Description:

About 4 cm long these are the largest of the North American Stoneflies.

Habitat:

Spotted in a wet bog meadow in the Cascade mountains at 3400 ft.

Notes:

A useful bio-indicator. The larvae of the American salmonfly live underwater during their early stages of life and are extremely sensitive to pollution. If their are chemicals in the water the larvae will die.

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Comments

Brian38
Spotted by
Brian38

Washington, USA

Lat: 47.09, Long: -121.41

Spotted on May 26, 2018
Submitted on Jun 16, 2018

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Reference