what kind of tree?

Ok here are some of the actual seeds:


I really hope its not red maple because that would be quite a few trees to cut down. I just wish this snow would go away! We just got another foot dumped on us yesterday.

Is this red maple? If I remember correctly, the leaves looked something like this... not 100% sure though.

....or maybe it's this?

I'm 99.9% sure that's a Red Maple leaf. I'd have to look back at your original post, but did you say these were bordering your pasture, or in the pasture?

Those are not maple leaves - possibly ash.

Hornbeam Maples have oval leaves, Acer carpinifolium.
Acer triflorum has oval leaves Three flower maple
Acer negundo has a compound leaf of 3-5 oval leaflets. Boxelder maple

The red maple fruit mature in May, so if the fruit is still on the tree this time of the year it is probably not a red maple.

Here is a good site for identification:

http://www.hort.uconn.edu/plants/a/acerub/acerub1.html

what about the second picture?
I think it was those... the trees are bordering our pasture. But they are really old and the branches hang over the pasture fence.

The site I got the pic from said they were maple...
Here:Winged Seed Pods And Leaves From A Maple Tree Stock Photography - Image: 14861812

This may be ash, and if so, you'll be just fine! One way to identify an ash tree in winter, is that the top branches resemble a "giant umbrella" opened up. White ash is easy, because the bark looks like long "diamond shapes".

It is close but the petiole, leaf stem should be more red.

Acer rubrum

Yes the seeds are still on the trees but not all of them. I'm pretty sure they have the oval leaves like in that picture I posted. I'll double check the pasture in spring.