S1, E1: They look like dragons. These primeval creatures inspire stories of man-eating, firespitting monsters. With their long claws, razor-sharp teeth and muscular, whip-like tails, monitor lizards are the largest lizards walking the planet. If you thought of reptiles as slow, sleepy, slithering critters, this adventure will make you think again. Monitor lizards, or Varanids, stand out - not just among the huge lizard family, but across all reptiles.