Mammals nocturnal

Water Chevrotain

Hyemoschus aquaticus

A mysterious 'fanged' inhabitant of the African rainforest, the Water Chevrotain is a master of the night and a surprising swimmer. Often called the 'mouse-deer,' this ancient species offers a rare glimpse into the prehistoric world of early hoofed mammals.

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Quick Identification

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Size

Length: 60-85 cm (24-33 in); Height: 30-40 cm (12-16 in); Weight: 7-15 kg (15-33 lbs)

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Colors

Rich reddish-brown coat with a pattern of white horizontal stripes and rows of white spots along the flanks. The throat and belly are white, with distinct white markings on the neck.

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Key Features

Elongated upper canines (tusks) in males instead of antlers
Distinctive white spots and stripes on a brown background
Rounded, arching back with hindquarters higher than the shoulders
Small, dainty legs supporting a stocky body

When You’ll See Them

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Activity pattern nocturnal

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Peak hours 9:00 PM - 3:00 AM

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Season Year-round

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Diet A specialized frugivore that primarily eats fallen fruits, but will also consume seeds, leaves, and occasionally insects or small animal matter found on the forest floor.

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Habitat Closed-canopy tropical rainforests, always within close proximity (usually less than 250 meters) to permanent water sources like rivers, streams, or swamps.

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Behavior

The Water Chevrotain is a shy, solitary mammal that is often referred to as a 'living fossil' due to its primitive features that have remained unchanged for millions of years. Unlike most ungulates, this species is highly dependent on water. When threatened by a predator, it will dive into a nearby stream or river and remain submerged or swim away to safety, utilizing its dense bones to help it stay underwater.

These animals are strictly nocturnal and lead a very private life in the dense undergrowth of the African rainforest. They are territorial, with females maintaining home ranges that rarely overlap with other females, while males typically occupy larger territories that encompass the ranges of several females. They communicate through a series of subtle vocalizations and scent marking.

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Camera Tips

To capture the elusive Water Chevrotain, placement is everything. You must position your camera near the water's edge, particularly along well-worn 'game trails' that lead into thick brush or along the muddy banks of slow-moving streams. These animals follow the same paths repeatedly, so look for small, delicate hoof prints in the mud that look like miniature deer tracks.

Set your camera low to the ground—about 10 to 12 inches high. Because they are small and stay close to the forest floor, a high-mounted camera will likely miss them or only capture the top of their backs. Aim the camera across the path rather than directly down it to ensure the side-pattern of spots and stripes is visible, which is essential for clear identification.

Since they are strictly nocturnal, a high-quality infrared (no-glow) flash is mandatory. White flash may spook them and disrupt their natural behavior. Set your camera to a multi-shot burst or a short video mode (15-20 seconds). These animals move with a quick, nervous gait, and a single photo might result in a blur. Video is particularly rewarding as it may capture their unique 'bobbing' walk or their interaction with the water.

While they are primarily fruit eaters, using an aromatic fruit lure like dropped figs or seasonal rainforest fruits near the camera can encourage them to linger. However, in their natural habitat, simply finding a natural 'pinch point' between a dense thicket and a riverbank is often the most effective strategy.

Similar Species

Species that look similar or are commonly confused with Water Chevrotain.

Blue Duiker

Blue Duikers are smaller, lack the white spots and stripes of the chevrotain, and have tiny horns rather than fangs.

Lesser Mouse-Deer

Found in Southeast Asia rather than Africa, the mouse-deer is much smaller and lacks the aquatic escape behavior.

Frequently Asked Questions

Water Chevrotain are almost entirely nocturnal. They spend their days resting in thick vegetation and emerge after dusk to forage, with their peak activity occurring between 9 PM and 3 AM.

The best way to attract them is to place cameras near their natural food sources, such as fruiting trees in the rainforest, or along the muddy banks of permanent streams where they come to drink and escape predators.

Their diet consists mainly of fallen fruits, but they are opportunistic. They also eat seeds, leaves, and have even been known to consume small insects or crustaceans found near the water.

No, they are not found in suburban areas. They require primary or secondary tropical rainforest with dense cover and permanent water sources, limiting them to specific regions in Central and West Africa.

Water Chevrotain can be distinguished by their white spots and stripes and their lack of antlers. Unlike Duikers, they also have a noticeably arching back and, in males, visible elongated canine teeth.

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