Be aware of this! Next time you are watering your Christmas tree, you are going to want to check it for praying mantis eggs. You may think it's a pine cone, but it could actually be a walnut-sized mass that turns out to be a praying mantis egg.
People started really checking after a Facebook page showed one of these masses on the trees. According to experts, if you see one, don't ignore it. Clip the branch it is hanging from and then place it outside or in a garden.
If you don't want to touch it, eggs might hatch inside your home!
Have you ever had this problem before?!