Evolution

This brings a whole new meaning to the phrase "You look like crap."

The Bird Dropping Spider or Celaena excavata has developed into a very interesting morphological state. To avoid predation from its number one enemy, birds, this spider has evolved body shape and markings that mimic the look and color of bird poop. No one wants to eat their own poop, right? But that's not all this amazing spider

has up it's sleeve: it also releases a pheromone that mimicks sex pheromones of female moths which the moth uses to attract a mate. Confused and lusty male moths will often find themselves in the web of a spider instead of the embrace of a willing female :)

http://www.brisbaneinsects.com/brisbane_weavers/BirdDroppingSpider.htm