This is an old vine that has been around for some time. Another such vine used to be on the west side of the Old Field thickets, but haven't seen it for awhile. Another vine has self-seeded along the fence at the Amphbian Pond. It didn't take long for it to grow to a substantial size. This is the non-native vine that not only is considered a serious invasive, especially a little bit south of here, but also hybridizes with our native bittersweet vine, not a good thing.