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.
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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> 30 August 2014.