I like the tails on these birds. They have a few long feathers that extend down the middle of the tail. For a black and white bird, it's quite a nice touch of flair.
I once made the point of mentioning that I am lazy at backgrounds. Here is a perfect example. In the photo, this bird has his butt nestled against a pile of rocks. So it makes sense that both his tail and his shadow climb the rock face. However, I hate drawing rocks. So I just left them out. And both tail and shadow hover in a bizarre white world. Oh well. At least now you know why the shadow does that weird thing.