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Spooky webs cover grass and playground in Hanover, Germany

Peter Steffen / EPA

Grass is covered with caterpillar webs in Hanover, Germany, May 25, 2011. Little caterpillars eat up vegetation and leave it covered with webs. According to butterfly expert Carsten Heinecke, the Ermine moth (Yponomeutidae) covers trees and bushes in soft cotton-like wool.

Peter Steffen / AFP - Getty Images

Wooden playground houses are covered with caterpillar webs in Hanover, Germany, May 25, 2011.