77 77 21 21

Public health pests

Processionary caterpillars

Caterpillars associated with pine trees. Their hairs can irritate people and pets, so nests and trails should not be handled casually.

Ask PPSCall PPS 77 77 21 21
Representative PPS outdoor-site image for processionary caterpillar guidance
PPS technician checking a rodent control station at a commercial site

Signs to look for

  • Silky nests in pine trees
  • Caterpillars moving in lines
  • Pet irritation after contact
  • Activity in gardens or school grounds

Risks

  • Skin and eye irritation
  • Serious pet reactions
  • Exposure around children or public areas

Prevention

  • Avoid touching nests or caterpillars
  • Restrict access below affected trees
  • Monitor pines seasonally
  • Seek safe removal advice

When to call PPS

  • Nests are in accessible areas
  • Children, guests or pets use the area
  • You need safe seasonal management

Pest library FAQs

What signs are reported for processionary caterpillars?

Silky nests in pine trees; Caterpillars moving in lines; Pet irritation after contact; Activity in gardens or school grounds

What risks can processionary caterpillars create?

Skin and eye irritation; Serious pet reactions; Exposure around children or public areas

When should I call PPS for processionary caterpillars?

Nests are in accessible areas; Children, guests or pets use the area; You need safe seasonal management