Say I have a structure like this:
Mammals Rodents Mice Gerbils Felines Ocelots Birds Songbirds Raptors Eagles Reptiles Lizards
I would like for the main menu to display: Mammals, Birds, Reptiles.
But when you are on, for instance, Mammals, or any of it's children. I wish for there to be an additional menu that shows all of the main parent and children (so in this case mammals, rodents, mice, gerbils, felines, ocelots).
Is there any way to set this up or a module that would help? I guess that the first step would be page groups, but I don't see reference to this hierarchy other than creating automatic menus.
(using drupal 7)