Elm sawfly

Description:

The largest North American sawfly. Curls up when at rest or threatened.

Habitat:

Found this in a wetland feeding on Salix amygdaloides. I tried giving it Salix nigra but it wouldn't take. It will eat Salix discolor however.

Notes:

The elm sawfly over winters as pupae and have only one generation per year, so I will have to wait until next year to see the adult.