Sawflies Sawflies Full-screen, JPEG images, can be viewed by clicking on the small images. Sawflies are a little known group closely related to wasps.
Some immature sawflies resemble caterpillars and feed in much the same manner.
This is the European pine sawfly. Colonies like this one can cause serious defoliation on red, Scots, and mugho pine. Sawflies can be distinguished from caterpillars by counting the number of fleshy prolegs they have. The bright red heads easily identify this pest as the redheaded pine sawfly. All species of pines as well as larch and deodar cedar are subject to attack.