Mammals nocturnal

Common Hippopotamus

Hippopotamus amphibius

Meet the 'River Horse,' a prehistoric-looking giant that rules Africa's waterways. Witness their surprising agility on land as they emerge from the depths for their nightly grazing rituals.

4 Sightings

4 Habitats

Quick Identification

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Size

Length: 2.9–5.0 m (9.5–16.5 ft). Height: 1.3–1.6 m (4.3–5.2 ft). Weight: 1,300–3,200 kg (2,870–7,050 lbs)

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Colors

Purplish-gray to slate-black, with brownish-pink tones around the eyes, ears, and skin folds

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Key Features

Massive, barrel-shaped body with short, stocky legs
Eyes, ears, and nostrils positioned on top of the skull
Enormous mouth with long, self-sharpening ivory tusks
Smooth, hairless skin that secretes a red 'blood sweat' for sun protection

When You’ll See Them

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Activity pattern nocturnal

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Peak hours 7 PM - 5 AM

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Season Year-round

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Diet Herbivorous grazers; they primarily consume short grasses on land during the night, though they may occasionally eat fallen fruit or aquatic plants.

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Habitat Freshwater habitats including rivers, lakes, and swamps, usually surrounded by grasslands for foraging.

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Behavior

Common Hippopotamuses are highly social yet notoriously territorial mammals that spend the majority of their daylight hours submerged in rivers, lakes, or swamps. While they appear lethargic while lounging in the water, they are incredibly agile and can be highly aggressive if their space is encroached upon. They typically live in social groups called pods, led by a dominant male who defends a specific stretch of the river.

Despite their aquatic lifestyle, hippos do not swim; they walk along the bottom of the waterbed. At sunset, they emerge from the water to travel inland along well-worn paths to graze. These nightly excursions can lead them several miles away from their aquatic homes. Though they are herbivores, their sheer size and unpredictable temperament make them one of the most dangerous large animals in Africa, particularly when they feel their path to the water is blocked.

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Camera Tips

Capturing a Common Hippopotamus on a trail camera requires a focus on both safety and durability. Because hippos are creatures of habit, you should look for 'hippo runs'—the deeply rutted, muddy paths they carve through the bank as they exit the water at dusk. Place your camera along these trails, but ensure it is mounted to a very thick, sturdy tree or a heavy-duty post. Hippos are massive and can easily knock over or crush a camera if they happen to brush against it while walking.

Since hippos are most active on land under the cover of darkness, high-quality infrared (no-glow) flash is essential. Standard white flash might startle them or cause significant 'white-out' on the image due to their reflective, wet skin. Position the camera at a 45-degree angle to the trail rather than facing it head-on; this captures the full side profile of the animal and allows for better identification of individual marks or scars. Aim for a mounting height of about 3 to 4 feet to capture the bulk of the body rather than just the legs.

Safety is the most critical consideration when checking your equipment. Never approach a hippo trail or water edge at night, as this is when they are most active and defensive. If your property borders a hippo-inhabited waterway, use a cellular trail camera so you can monitor their movements from the safety of your home. During the dry season, hippos may travel further for food, making it an excellent time to set up cameras near permanent water holes or the few remaining lush patches of grass.

Similar Species

Species that look similar or are commonly confused with Common Hippopotamus.

Pygmy Hippopotamus

Much smaller and more solitary, with a more rounded head and eyes on the side of the face rather than the top.

Frequently Asked Questions

Common Hippos are most active at night. They spend their days resting in the water to stay cool and avoid sunburn, emerging only at dusk to spend the night grazing on land.

You should never intentionally attract hippos, as they are extremely dangerous to humans. However, those living near African waterways may find hippos attracted to short, well-watered lawn grass, which provides an easy meal.

Common Hippos are primarily grazers. They use their wide, muscular lips to crop short grass. A single hippo can consume up to 80 pounds of grass in one night.

In certain regions of sub-Saharan Africa, hippos frequently enter suburban areas that border rivers or lakes. This often leads to human-wildlife conflict as they may wander into gardens or across roads.

Common Hippos are much larger, weighing up to 3,200kg, whereas Pygmy Hippos only reach about 275kg. Common Hippos have eyes on the top of their heads for aquatic living, while Pygmy Hippos have eyes on the sides of their heads for forest life.

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