Duck on a Rock is an actual rock formation in Grand Canyon National Park. As soon as you see it you say "Man, that looks like a duck!" and then you go and Google it to make sure you're not crazy, and you're not. It's the actual name of it.  To me it looks like Daffy Duck is hatching out of any egg with that round base at the bottom of it. It was a fun one and painting rocks is always a good challenge, which I like.