This is tree in a small forest in southern Germany; it was completely covered by silk of ermine moths. At first glance it looks terrible but it’s also fascinating to the mass of caterpillars in the communal web. For the tree, the moths are highly dangerous. This one has lost all leaves.
Part of the web.
A nest with caterpillars.
The high amount of moths is also attractive for parasites; these are some ichneumon wasps placing eggs in the moth pupae.