Ok, so do you remember my tree issue I had a couple of months back?  My oak tree had fuzzy things all over it and it was falling onto the ground and was making leaves fall off of my tree? 
Here's the old blog:  http://www.lovinthesimplelife.com/1/post/2011/09/caterpillars.html

I thought that it was some type of caterpillar but could never identify what exactly it was.  My extermination guy came out and he didn't know what it was either but I collected some of it for him and put them in a ziplock baggie and he took it with him.  
Today I get a phone call from him!  He said that he sent it to O.S.U. to the entomology department and they sent him a reply.  Turns out they are the egg of a gall wasp.  Or in my case thousands and thousands of gall wasps.  Which sounded alarming at first, right?  I was thinking what is going to happen in the spring when they hatch!  
This is what's so cool.  They have such a symbiotic relationship with oak trees!  They use the oak tree as protection.  90% of them will nest in oak trees.  The oak tree in turn will actually grow this fuzzy covering to protect the eggs.  And the eggs fertilize the tree!  How cool is that?!!!    I am so excited that I got to witness such an amazing event!   So not only does this bug not harm my tree but it helps it.    They said infestation should not be an ongoing problem but they don't recommend spraying the trees for the survival of the species.  :)  

I learn something new every day!!!