Howling black cat in front of a full moon traced from http://thegraphicsfairy.com/retro-halloween-clip-art-black-cat-with-moon/
This is a completely free image Black cat and moon that you can download, post, and use for any purpose.
Image License: CC0 No Rights Reserved
You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission, and at no cost. This image is completely free.