In the tree

I think you did a great job with your landscape here!  There's a nice sense of depth and the angle of the clouds is very nice for the viewer's perspective.  I would say, that either the darks in the foreground could be even darker on the animals and the foliage around and/or the background could be a little more muted.  Maybe a layer of grey over it that you turn the opacity way down on.  This would help both separate the foreground from the background a little more and give more depth with the contrast.  

You have some really great little details in the foreground with the different leaves in the foliage and the butterfly.  Great job overall!