To a croc this big, anything that ventures near a watering hole is a potential meal.
Crocodiles can't easily chase down prey.
They are ambush hunters that prefer their prey to come to them.
It's feast or famine for the crocodiles, so they gorge when food is plentiful.
And the biggest meal of the year is about to arrive.
Searching for water and green grass, millions of zebras, wildebeests and antelopes join one of the largest mass migrations on the planet.
Rivers are one of the few reliable sources of water, but they are also home to crocodiles.
The herd gathers at the river's edge.
They're suspicious and the crocs don't want to scare them off, so the crocs lay low, hoping to lure as many into the river as possible.
The croc can stay underwater for up to two hours at a time.
It works its way to the edge.
Waiting for the right moment.
Inches from a kill, but it misses.
Spooking the first row of animals.
However, there are hundreds of thousands more that need to cross.
The croc just has to retreat and bide his time.
