I found this cool moth while visiting the Golden State. A member of the Geometridae Family, their larvae, or inchworms, appear to measure the earth as they move along in a looping fashion.

This large family contains about 23,000 described species. Their caterpillars lack legs in the middle of their bodies, instead only having them at the front and back of their body.

To move, the caterpillar clasps with its front legs and draws up the hind end, then clasps with the hind end and reaches out for a new front attachment, creating the impression that it measures its journey.

The caterpillars are accordingly called “loopers,” “spanworms,” or “inchworms” after their characteristic looping gait. Most adult versions of moths from this family have broad wings which are held flat with the hindwings visible.

The moth’s colors and patterns tend to blend into the background, often with intricate, wavy patterns on their wings. Most species are of a moderate size. Adults fly from April to October, depending on location.

The habitat of the Behr’s Pero is pine forests and the caterpillars feed on several genera of pine tree needles.

Third Eye Herp
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