Willow Sawfly (Nematus ventralis) larvae are a common pest on willows (Salix spp.) and poplars (Populus spp.) in North America. Willow Sawfly is a non-stinging member of the wasp family (Tenthredinidae). Larvae appear similar to caterpillars, but have 6 or more prolegs (fleshy legs located behind the front 3 pairs of legs), while true caterpillars have no more than 4. These larvae were found feeding on a willow sapling next to the ramp located at the SW corner of the south lake's west bay. 9/14/14 (Wolf. Oesterreich)
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