I will throw out a guess of one of the smaller leafed maples but man I had to zoom and squint at the picture.

Is the tree accessable to you where ya can take a pic of several leaves on the end of a branch?

maybe a red maple, but tornado is right - pictures of the leaves would help a bunch

Picture of leaf in follow-up post.

Here is a link that might be useful: leaf photo

just FYI .... you put the second pic.. in the FIRST post.. by simply replying to your original post .... else they get separated ... and we get confused ....

good luck with your maple ... let us know if we can be of any further help ...

ken