Yeah man, this is exactly what I had in mind when I wrote a comment on your earlier version of this one.
Great improvements on the size and quality. Now you can see individual grasses and they are nicely AA'ed.
The soft-shadows are a great improvent, especially on the bark of the trees. I guess you didn't use the fill-light method I proposed, isn't it?
I agree with you about the birds, but I don't find it too distracting. By the way, where did you get the models?
Very nice work, keep it up

Martin