Another Wood ID? What's this tree?

Ailanthus, grows like weeds around here. Have burned cords of it over the years,easy to process and split. Doesn't smell too good, but when it burns the stove still gets hot!!

Hmmmm. Tree of Heaven huh? It does resemble the images U found via google. I also seem to remember seeing a lot of those fern like leaves around that area of the woods in the summer.... Could be it. I'll take another look when the snow is gone...

Oh, I should add this area of the woods was clear cut years ago (40's or 50's I think), was used to dump fill ( it was swampy, and they filled it in a bit). It is now a full blown woods as it has not been touched since back then. So it is full of invasive species.... Which explains all the Black Locust, and this which is all over the place.