Birch Sawfly

Open woodlands, gardens, and areas where birch trees are prevalent throughout Europe and Asia.

Larvae feed on the leaves of birch trees (Betula spp.), while adults typically feed on nectar and pollen.

Adults are most active during early summer. Females use a saw-like ovipositor to cut slits in leaves and deposit eggs. Larvae often feed gregariously on leaf margins, and the species undergoes a complete metamorphosis (egg, larva, pupa, adult).

They can cause localized defoliation of birch trees, which is a risk to forestry and ornamental plants; however, they do not sting humans. They serve as a food source for birds and parasitic wasps, contributing to ecosystem biodiversity.