As of lately I have been experimenting with trees in FSX, and it appears to have some effect on animated birds (yes the small fluffy ones).

 

At first they froze in mid air. Trying to reset the old settings, they seem to have vanished altogether. Anyone who had the same issue or know a way to reset bird animations? I really never paid much attention to them, but with everything else working nicely it adds another dimension in terms of atmosphere.

 

Yes, I have enabled advanced animations...

I thought it was Orbx scenery that created these, probably global. Saw it mentioned once in their forums, no idea how to disable.