The three poisonous species of reptiles and amphibians native to the region the rare desert massasaugua, as well as the diamondback and prairie rattlesnakes are scarce and live primarily outside the dune area.
(the diamondback and prairie rattlesnakes; are; scarce and live; L:primarily outside the dune area)
the diamondback and prairie rattlesnakes
are
scarce and live L:primarily outside the dune area