For most bugs, birds are the bad guys. For bark bugs, which hang out on trees around the world, this is especially true. In order to hide in the middle of nature's birdhouses, bark bugs appear to be part of the tree itself.
Please copy/paste the following text to properly cite this HowStuffWorks article:
the Editors of Publications International, Ltd.. "11 Animals that Use Camouflage" 30 October 2007. HowStuffWorks.com. <http://animals.howstuffworks.com/animal-facts/11-animals-that-use-camouflage.htm> 31 July 2014.