It's bad enough there could be a Christmas tree shortage this holiday season, but if you do get that fresh tree, you may be bringing home thousands of unexpected guests. Pest control company Safer Brand says as many as 25,000 bugs could live in one Christmas tree. According to the company, most of the bugs aren't dangerous and will eventually die. The common bugs that survive are aphids, spiders and bark beetles. Safer Brand suggests customers inspect trees for potential bug nests before buying. The company also says if you do buy a tree, leave it in a garage for a few days and shake it out before bringing it inside your home.