Once you've seen the duck you'll know there can't be any others like it... ;) There is a DUCK petroglyph on a rock wall near the entrance to the RED DOT trail in White Rock, NEW Mexico that I saw in August 2011, that is very close to identical to the one below Perry Tank ruin. It faces the same dir...

Thanks guys! I'm also interested in the timelines of development and migration and the relationships between the various peoples. In my opinion there is no one book that deals excellently with "the timelines of development and migration and the relationships between the various peoples." ...