Red-headed pine sawfly larvae have red heads as the name indicates but has a yellow body with black spots. Pine sawfly adults typically lay groups of eggs so multiple larvae hatch and feed in groups.

These sound like larvae for red-headed sawfly that are about an inch long when full grown. They are sometimes referred to as pine caterpillars, but that includes many types of caterpillars.

If your pine tree is suddenly infested with a black-headed, Medusa-like worm, fear not — chances are the tree is simply hosting a colony of European Pine Sawfly larvae. Sawfly larvae hatch in ...

This could happen. The 1/8 inch, yellow-headed sawfly larvae feed for a month or so ... The damage caused by the larvae is first observed in the tops of trees which start to get a brownish-red ...