Unknown Caterpillars

Unknown Caterpillars

Observation - Unknown Caterpillars. Description: I have found about 4/5 of these fellas in the roots of plants I was planting up today.This was the biggest one (found in Butcher's Broom roots). Bit of a poor pic, but the caterpillar came straight out the earth.Could it be a Yellow Underwing?

I have found about 4/5 of these fellas in the roots of plants I was planting up today.This was the biggest one (found in Butcher's Broom roots). Bit of a poor pic, but the caterpillar came straight out the earth.Could it be a Yellow Underwing?