ok got a bird question!!!! (long one)

Ok I spent a hour making this diagram of my farm, hope it helps..... while making a little fenced in area between paddock 1 and 2 I decoverd a nest in a tree where the arrow is, it's in a branch that over hands in to that small paddock.



In the diagram i've marked off where all the trees are with green



I'm asumming that the nest was just made with in the last few days, my husband mowed the back yard a few days ago so that's where I think the birds got the dead grass, I didn't see any eggs in it.



I'm really not sure what to do about the nest and my horses, does any one know what kind of bird maks this nest?, should I open all three areas and hope that they don't mess with the nest?....gggrrrr what should I do?

It kind of looks like a wrens nest. If its small and sort of like a pouch with a small hole, that's what it is. Wrens like to nest fairly low, so I'm betting that's what it is. If there are no eggs in it I wouldn't worry to much about letting the horses in the area. Birds in general and wrens in particular build nests very quickly. They will build another if they don't like the horses nosing around.
I have had wrens build nest in the pockets of jeans hanging on the line to dry, that's how fast they are.

Wrens are amazingly fast nest builders! I had knocked down a nest that was on our porch light and by that evening they had it rebuilt!

I wouldn't worry about he birdies and the horses...They will get along fine or the birds will move their nest. ( You are a sweetie for being concerned )