Green Heron makes a Pig of itself

This adult Green Heron battled for twenty minutes before it devoured this huge Pig Frog. It had to kill it before swallowing the frog. Throughout the scene, the heron never let go as the frog would have jumped away. Because of the frog's weight, the heron couldn't thrash the prey either, like a kingfisher does. It simply squeezed the life out of it, then kept dunking the frogs head in the water, presumably to drown it.