The crocodiles seem to know a herd of wildebeest has arrived before anyone else does. The most ferocious group of crocodiles is in line along the shore awaiting a chance to capture one of the wildebeest. After a series of weeks, the seasonal river shrinks into a series of pools. This makes it even harder for animals to get something to drink without getting attacked by a crocodile, some of which are eighteen feet, weigh almost a ton, and can move at extremely deadly speeds. On top of this, the crocodiles will eat anything they can The crocodile is a cold-blooded reptile with a very slow metabolism; therefore, they can last six months or longer without eating. Many of the crocodiles only eat when these herds come. The herds are easier targets because many of the wildebeest, especially calves, have never seen a crocodile before. The impalas, baboons, and warthogs that live there year-round have learned when and when not to approach the river.
The crocodiles? annual feast on the unexpecting wildebeest in the Grumeti River has proven these crocodiles to be very strong and deadly.