Dear WW: if you have any roses that need pruning, take a stalk with thorns, and impale raisins on thorns. It might look more natural to the mockers.
Here is a URL with some more mockingbird pictures:
http://www.afn.org/~don/mock.html

In the URL,he talks about birds having "gray eyelids". I think he may be mistaken, and was describing the "nictitating membrane". Here's a URL, scroll down 1/3
http://ebiomedia.com/gall/eyes/protect.html