question on property rights

[BrianS]

I am not entirely sure where my backyard ends and the neighbors begins. There is an old wire fence and a row of trees.

The neighbors in the back cut down several of the trees last summer, it annoyed the hell out of us but they appeared to be on "their side of the fence" even though the fence was nailed to them, we didnt question it.

They left about 4 foot stumps up because of the fence.. it basically looks like crap and the fence is falling down at 2 spots twords our yard.

Update, this week they put up a 6' stockade fence on the inside of the wire fence, basically so they didnt have to see the stumps and wire.

So my question is this - what are my rights?

If I ask them to do something about the wire fence, and they dont, do I have legal rights? Like can I toss the portions that are falling into my yard back into their yard?

I dont think this will happen because the wire fence surrounds their yard but if I find out the fence is in my property (and technically the tree's) can I sue them for chopping down the tree's?

Honestly, it may not even be a problem, this is a 60ish couple, and Ive never actually said more than "hi" to them. It may be a non issue and they will be happy to clean up their mess, but I dont think its fair for their crap to be in my yard.