Brontosauruses are truly gigantic behemoths, plodding herbivores large enough to be unafraid of all but the most massive predators. Brontosauruses have stout bodies and long, sinuous necks ending in small heads, allowing them to graze from the highest treetops. Their powerful tails are equally as long as their necks and provide counterbalances. Brontosauruses bear their bulk upon four stout legs. Although their feet are capable of crushing entire buildings, these herbivores are generally peaceful and considerate of where they step.