Crocodiles
During the Great Migration, Nile crocodiles attacked wildebeests and other animals while crossing the rivers. This is one of the reasons the crossings are so dangerous for the migrating herds. These crocodiles can reach lengths of up to 5 meters (17 feet). Shudder. They can live for up to 70 years!
Nile crocodiles prey on the Great Migration herds during their river crossings
Dangers of the Great Migration
Every year, approximately 250,000 wildebeests die from the Great Wildlife Migration, which numbers around 1.5 million. This means that approximately one-sixth of the wildebeest population does not survive the Great Migration. The causes of death vary and include being killed by predators, dying of thirst or starvation, and drowning while crossing large rivers.
River crossings of the Great Migration
The Great Migration’s wildebeests, zebras, and antelopes must cross many streams and rivers in search of water and green pasture. Larger river crossings are especially dangerous.
The animals must cross the Grumeti and Mara Rivers in the Serengeti, which are crocodile-infested. The herds rush across the rivers, sensing danger. Crocs kill some of the animals, while others are trampled to death and drowned by the current.
The frenzy and chaos of these dramatic crossings captivates many safari-goers to the Serengeti’s Mara and Grumeti Rivers.
It’s also worth noting that the carcasses of animals that didn’t make it across the infamous Mara and Grumeti Rivers play an important role in the latter’s ecosystem. The decaying bodies provide vital nutrients to the rivers, while scavengers feast on the dead animals. According to National Geographic, the Serengeti’s rivers receive two million pounds of rotting wildebeest flesh every year.
River crossings are very dangerous for the herds of the Great Migration, but thirst and hunger are, in fact, the bigger baddies.