Bark and the tiny elm-shaped leaves. We’ve lived here for 20 years this tree has grown quite a bit since then and every year of those 20, the leaves get munched on by these little bugs - doesn’t kill the tree. I’d say the leaves max out maybe at 2 inches but most of them - an inch to an inch and a half long. A gigantic version of this exact tree is about three houses down and we think that’s the mother since our tree is exactly on our property line next to our garage and no one purposely planted it there. We actually boxed our fence around the tree. We like it because it hides the transformer and the power pole right behind it. Anybody?