The hairy worm of the evergreen oak is in fact the larva of the gipsy moth (Lymantria dispar ). These larvae live all together in nests made of holm oak leaves which are sticked by fine, silky filaments. The larvae eat mainly holm oak and cork oak leaves, but also can feed on leaves of fruity trees, oaks or other trees and bushes of the forest. They can be a defoliating plague. The swatches of long hairs exit from a range of bumps showing two colors, blue in front and red in the rest of the body and at the back. [photo Xavier Adot]