It's hard to picture one of these gentle, orange little bugs as an exotic pest, but they can be. "The problem is that in winter they'll swarm inside of an attic and hibernate during the cold weather," says Ron Harrison, director of technical services for Orkin Pest Control in Atlanta. "Then in the spring they'll start dropping down through holes in the ceiling onto people's heads or into their food. Then they're not so cute." If it's a serious infestation a professional probably needs to be called. However, you can prevent infestations by making sure the attic vents are screened off and any conduits going into the space are secured.