I agree with everything that JBes97 said. Take my comments with a grain of salt as I'm pretty new to this.
Pic #1
I would take a few steps back to show more of the tree/landscape. If there had been a bird, or some other specific object of interest, I could see taking the shot that close.
Also, and this is my personal preference, I prefer the sky to be in focus on a pic like this-- if you intent is to show a silhouette against the sky. Maybe lower the aperature a bit.
Pic #2
The biggest issue I see with this pic is that it looks out of focus/blurry. White balance could use a little correction.