Ravens are very very smart birds. When I worked as the Camp Ground Host I would warn visitors not to leave back packs or backs out as the ravens would come, tear them open and search for food items. Folks talk about the raven duo that could get the lid off a garbage container by jointly flying up while holding the inside plastic bag to dump the contents in the parking lot for a feed.
These people are on the canyon rim looking down onto Pueblo Bonito in
the afternoon - great place to take photos on a clear (or any) day.
