Horned Spanworm Moth

This strange, “dragon” shaped caterpillar has eversible tentacles extending from the top of two of the central sections of its body. In the above photo, they are in the “relaxed” configuration, but, when the caterpillar is startled, it can extend its tentacles to 2x their resting length.

The adult moths are varying shades and patterns of brown, mostly in a geometric “tree bark” flavor. They range through most of eastern North America, preferring forested areas. Larvae eat (the leaves of) a wide variety of trees.

Identified by the kind people at iNaturalist.

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