Explore recent community sightings of Processionary Caterpillar (Ochrogaster lunifer) — where it's been spotted, related encounters, and field notes from local observers. Keep an eye out for these social crawlers! Named for their habit of traveling in long, single-file lines, these caterpillars are a fascinating sight on tree trunks during your nature walks. Admire them from a safe distance as they march to their next meal.