A note on a Mexican field guide. I have a Peterson Mexican guide. It is
fine, but you need to take the Peterson's East and West guides as well,
because he doesn't repeat the pictures of alot of birds. When I was in
Mexico, my experience was such that it was a real disadvantage, maybe if you
are a master birder you wouldn't need as much help. Sorry I don't know about
birding in Puerto Vallarta, wish I did. Have fun.