Wood boring worms?

Wood boring worms?

Observation - Wood boring worms? - UK and Ireland. Description: Whilst out doing some fieldwork, some bark was disturbed on an old Scots pine trunk that was felled a few years ago. There was a large mass of small yellow worms with black streaks running down their length. They weren't very active, but this could be

Whilst out doing some fieldwork, some bark was disturbed on an old Scots pine trunk that was felled a few years ago. There was a large mass of small yellow worms with black streaks running down their length.

They weren't very active, but this could be due to the cold weather.