I came across some free vector art on this site and normally I would just do my own, but I thought I'd experiment a bit with some of theirs. Feel free to download this. It's just a low resolution JPG, but it may be nice for a printable for your Halloween decor.
(owl and treescape from vectorjungle)
Click on image above and it will open in a new window. Right click and 'save picture as' onto your computer and then print!