Oak processionary moth
months. From the 5th instar on, the larvae start building silken nests at the base of lower branches, on the trunks or at the base of the trunks, which [...] of this moth refer to the behaviour of the larvae to form long processions. The moth is native to central and southern Europe but is now present in almost [...] reducing the viability of oak trees. However, this is usually less of a problem as the trees normally recover from this. More important is the health risk