I'm not sure why, but I just love these vinyl decals by Popwall. The trees, the branches and the birds can be configured however you want them. I love them so much I bought one for someone on my Christmas list! There are many patterns to choose from but I guess it's the linear pattern that these create that I find so appealing.
To add a touch of whimsy to one of your rooms visit: http://www.etsy.com/shop/NouWall?ref=top_trail
for all of the details, these are about $70.
Have a great Weekend,