Here is a photo of a newspaper photo on display at Guadalupe Mountain National Park in Texas. The dancers are Apache Spirit Dancers. Their headgear is remarkably similar to the petroglyphs. The dancers shown are maybe only a hundred years ago.
All represent manifestations of long and nearly forgotten visits by extra terrestrials IMHO.

Boy, is that interesting! You really captured this one, I was sitting there wondering what on earth they were trying to depict, with that headgear. Even shows the diamond patterns. What do the Apache’s feel the headgear represents?
Check out these video trailers of David Talbott’s new DVD. Be sure to watch all three; very interesting stuff here, and the further you watch, the more interesting it gets.
http://www.youtube.com/watch?v=qzxVhLcCH8w&feature=related
http://www.youtube.com/watch?v=Y4ZT-IOf0gM&feature=related
http://www.youtube.com/watch?v=XoThe9EzcaE&feature=related