beetle grub

beetle grub

Observation - beetle grub - UK and Ireland. Description: found in a dead silver birch branch, a lot of the trees are dying in this park, could it be because of these grubs or are they moving in after the trees have died?

found in a dead silver birch branch, a lot of the trees are dying in this park, could it be because of these grubs or are they moving in after the trees have died?