Birch Skeletonizer


Larvae are pale yellow/whitish, sometimes tinted with green. You may see white webs or cocoons present on the undersides of leaves. The larvae feed between leaf surfaces in the leaves that may be accompanied by white silken webs found on the under surfaces of leaves. Late summer the skeletonized leaves may turn brown and drop. The adult moth spends the winter in tiny brown ribbed cocoons that it constructs in the debris under the trees. Adult moths are small, brown in color with white bands across their wings, and hind wings that are grey and heavily fringed. The adult moths emerge between June and late July and lay their eggs and about 2 weeks after egg laying, the tiny yellow/whitish larvae emerge.