Nile crocodile facts reveal one of Africa’s most formidable and ancient predators, abundant in Uganda’s lakes and rivers where it has been hunted and feared by riverside communities for millennia. The Nile crocodile is Africa’s largest reptile. Big males commonly reach 4 to 5 m and can exceed 5 m and 500 kg, while females are smaller. Crocodiles are thought to live for several decades, possibly 70 years or more. In Uganda the biggest are seen below Murchison Falls on the Nile, and they are also common on the Kazinga Channel in Queen Elizabeth and along Lake Victoria and Lake Kyoga.

Nile Crocodile Facts: Size, Lifespan and Hunting Behaviour Explained

How crocodiles hunt

Crocodiles eat fish for much of their lives, but large adults ambush antelopes, buffaloes and other animals that come to drink, seizing them and dragging them underwater. They can stay submerged for long periods and see, hear and smell while almost completely hidden. Groups sometimes share a carcass, twisting off pieces by spinning their bodies.

Breeding

Females lay 25 to 80 eggs in a nest dug in a sandbank and guard it for about three months. The nest temperature decides the sex of the young. When the hatchlings call from inside the eggs, the mother digs them out and carries them to the water in her mouth. Most hatchlings are eaten by birds, monitor lizards and fish in their first year.

Crocodiles in Uganda

Crocodiles were absent from Lakes Edward and George for a long time, possibly since volcanic activity thousands of years ago, and only reappeared there in recent decades. Today the Murchison boat trip to the falls is the best place to see huge crocodiles. The gorilla permit costs US$800, or US$600 in April, May and November. See our guides to hippo facts, Murchison Falls animals, Queen Elizabeth and Uganda’s most dangerous animals.

Frequently asked questions

Distribution in Uganda

The Nile crocodile is found in Lake Victoria, the River Nile, Lake Albert, Lake Edward, the Kazinga Channel, and most of Uganda’s major rivers and lakes. It reaches its highest density in the Nile between Murchison Falls and the lake, where the boat trip regularly produces large numbers of crocodiles basking on sandbanks. The Kazinga Channel in Queen Elizabeth has a healthy population visible from the boat. Lake Mburo also has crocodiles. The species was subject to intensive hunting during the 1950s to 1970s for its valuable skin, with population collapses in many areas, but has recovered substantially in Uganda’s protected waters.

Size, Lifespan and Growth

Nile crocodiles are the largest reptile in Africa and one of the largest in the world, with large males reaching 5 to 6 metres and weighing over 700 kilograms. Growth is continuous throughout life but slows markedly after sexual maturity. In the wild, Nile crocodiles routinely live 70 to 100 years; some captive specimens have survived over a century. Sexual maturity is reached at 12 to 16 years of age, and females nest annually, producing 25 to 80 eggs in a soil nest. The mother guards the nest and helps hatchlings emerge, carrying them to the water in her mouth — this maternal behaviour is extraordinary for a reptile.

Hunting Technique

The Nile crocodile is an ambush predator, lying motionless at the water’s edge or just below the surface until prey comes within striking distance, then exploding forward with a burst of speed for a short distance. Its jaws exert the greatest bite force of any living animal, but it lacks the muscular ability to chew — prey is killed by drowning and then consumed in a ‘death roll’ that tears pieces loose. Nile crocodiles in Uganda take fish as their primary prey but also take mammals up to buffalo size, and are responsible for a significant number of human fatalities each year at lake margins and river crossings.

Conservation Status

The Nile crocodile is classified as Least Concern by the IUCN globally, but some local populations remain below historic levels following the 20th-century skin trade. Uganda’s Nile population has recovered well under national park protection and is now stable. A crocodile farming industry operates in Uganda for the legal skin trade, reducing poaching pressure on wild populations.