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Western tent caterpillars

Malacosoma californicum


Numerous caterpillars (moth larvae) of various shades of beige-brown and averaging about 2 inches long, encased in silken webbing.


Pacific Northwest montane forest.


Spotted devouring the vegetation within their "tents" in a near-ground shrub and along an overhead tree branch, part of an infestation extending from low shrubs to tree canopies in the Newhalem Campground in North Cascades National Park.

1 Species ID Suggestions

Brian38 10 months ago
Western tent caterpillar
Malacosoma californicum Malacosoma californicum - Wikipedia

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Brian38 10 months ago

Your welcome Allen. Great second pic - showing the destructive impact these caterpillars have.

Allen Hoof
Allen Hoof 10 months ago

Brian38 - thanks for the ID.

Allen Hoof
Spotted by
Allen Hoof

Washington, USA

Spotted on Aug 19, 2019
Submitted on Aug 25, 2019

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