Douglas-fir Tussock Moth

The Douglas-fir Tussock Moth is a forest insect that primarily feeds on Douglas-fir trees. During its larval stage, it appears as a hairy caterpillar that can cluster on tree branches, sometimes causing defoliation. While usually not causing serious harm, large outbreaks can weaken or temporarily stunt trees, making them more vulnerable to other stresses. The moth plays a natural role in forest ecosystems, and management efforts may be needed only during severe infestations to protect tree health and forest stability.