I think both shots are very creative, and what I really like is the fact that they're "different". Not that there's anything wrong with color photos, but to see these is a refreshing change for me.
I also like the amount of negative space in each of these, as, for me, it serves to highlight the other elements in the photo, namely the birds (of course), as well as the tree branches, water, etc.
Bottom line - I like them both. If I had to pick a favorite, it would probably be the first one. The second one, though, is also splendid, IMO.