Submitter does not have a specimen

Description of specimen

Several "tents" of caterpillars in a tree. Large caterpillars, with long hair, seen moving around inside the tents. The tents were up in the tree, so I wasn't able to get close enough to clearly identify the species. Unlike the pictures I've found of the western tent caterpillar, no caterpillars were on the outside of the tent.

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Commentary

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