unknown caterpillar

unknown caterpillar

Observation - unknown caterpillar - UK and Ireland. Description: dark upper pale lower. jet black shiny head. feeding en-masse on 5 year old oak saplings. completely stripping them of leaves. around 20 trees in all, all in the same area. Same happened last year to same trees. (leaves grow back later)

dark upper pale lower. jet black shiny head. feeding en-masse on 5 year old oak saplings. completely stripping them of leaves. around 20 trees in all, all in the same area. Same happened last year to same trees. (leaves grow back later)