The presence of caterpillars causes many trees in the city of Cambridge, England to look bizarre like "ghosts".
Caterpillars release spikes on trees in Cambridge, England.
Silk covers the caterpillars, helping them to stop birds.
Sometimes people see thousands of worms on a tree.
They cause great damage to the tree, although the tree can recover next year.
Entire plants in the Jesus Green area, Cambridge city became the home of caterpillars.
Countless worms on a tree.
A worm turns into a butterfly.
