what kind of tree is this?

Question

And is it an invasive species in Northern Illinois?

Answer 1

How about taking a photo that we can use, such as a closeup of a single leaf? A closeup of a winter twig would also be useful.

Answer 2

I got part way through tree identification at What Tree Is That? at https://www.arborday.org/trees/whattree/WhatTree.c... , but didn't know the answers to some of the questions. You might get further, since you have the tree right there to look at.

My guess, based entirely on leaf shape, is some kind of mulberry. Notched leaves with pointy ends, alternating on the branch. But I can't see bark and right now there's no fruit or bud to compare.