This panel is the best known, but many other pictographs can be found in the canyon:
The above figure looks a bit like a martian to me.
Humans have a need to put their mark everywhere, even where it may not belong. One of the names above is Joe Biddlecome, dated 1911. Joe was one of the first ranchers in the area. Probably he had no clue that he was scratching over irreplaceable 3000 year old art.
The topmost portion reminds me of a cat's head, complete with mouth, nose and ears. Steve thinks it's a desert turtle, long neck extended as it surveys the scenery. What do you think?
Next time, I'll show you a few live critters we saw along the way.