Is there a particular time of year when processional caterpillars are more active?

Processional caterpillars are most active in the spring, typically from late March through early June, depending on the climate of the region. This is when they emerge from their eggs and begin their distinctive behavior of moving in long, procession-like lines. During this time, you may notice them traversing roads, trails, and even gardens, as they search for food, primarily the leaves of oak trees. Their activity peaks when temperatures are mild, providing ideal conditions for feeding and growth.

As summer approaches, the caterpillars will mature and eventually pupate, leading to a decrease in their visibility. However, the specific timing can vary based on local weather patterns and geographical location. In some areas with milder winters, you might find them active a bit earlier in the season. If you're eager to observe these fascinating creatures in their natural habitat, planning a visit during the spring months will offer you the best chance to see them in action. Just be sure to admire them from a safe distance, as they can be quite hairy and may cause skin irritation.