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Rhombic Night Adder
Least Concern Reptiles

Rhombic Night Adder

Causus rhombeatus

A frog-eating viper often encountered on wet nights.

Quick facts

Rhombic Night Adder (Causus rhombeatus) is a Reptiles you may encounter across Eastern and southern Africa from Kenya and Tanzania south to South Africa.. It prefers Moist grassland, savanna edges, gardens, wetlands and disturbed areas., feeds mainly on Mostly frogs and toads, also small lizards and rodents., and is most active Nocturnal or crepuscular, especially after rain.. On the IUCN Red List it is listed as Least Concern.

Scientific name Causus rhombeatus
Swahili name Nyoka kifutu wa usiku
Conservation status Least Concern
Sighting difficulty Moderate
Best season Dry season (Jun–Oct)
Class Reptilia
Order Squamata
Family Viperidae
Size Adults usually 40-70 cm.
See this species in the app

How to identify

Brown to olive snake with dark diamond blotches and a V-shaped mark on the head.

Habitat

Moist grassland, savanna edges, gardens, wetlands and disturbed areas.

Diet

Mostly frogs and toads, also small lizards and rodents.

When it is active

Nocturnal or crepuscular, especially after rain.

Where it lives

Eastern and southern Africa from Kenya and Tanzania south to South Africa.

How to spot it

Use a torch on rainy nights but avoid handling; bites can be painful.

Photography tips

Photograph from above at a safe distance to show the diamond pattern.

Threats

Wetland degradation, road mortality and persecution.

Similar species

Puff adder is broader and has chevron bands rather than neat rhombic blotches.

Field guide notes

How to Spot the Rhombic Night Adder on an African Safari

The Rhombic Night Adder is one of the most sought-after species to track on an African safari, and knowing its habits turns a hopeful search into a confident one. This field guide breaks down how to recognise the Rhombic Night Adder at a glance, the habitats and times of day that reward patient searching, and the practical tracking craft guides rely on. Read it before you set out and you will spend less time scanning empty bush and more time watching the animal itself.

Brown to olive snake with dark diamond blotches and a V-shaped mark on the head.

Concentrate your search for the Rhombic Night Adder in Moist grassland, savanna edges, gardens, wetlands and disturbed areas., the habitat where it feels most secure and finds its food. It is most active Nocturnal or crepuscular, especially after rain., so plan your game drives around those hours rather than the heat of midday. Across the continent the species ranges through Eastern and southern Africa from Kenya and Tanzania south to South Africa., and within that range the richest sightings come where prime habitat meets low human disturbance.

Finding the Rhombic Night Adder starts long before you see it. Learn the habitat it depends on — Moist grassland, savanna edges, gardens, wetlands and disturbed areas. — and you narrow the search from an entire landscape to a handful of promising corners. Animals are not scattered at random; they sit where food, water, cover and safety overlap, and the Rhombic Night Adder is no exception.

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Rhombic Night Adder: Facts, Habitat and Conservation

The Rhombic Night Adder (Causus rhombeatus) is a distinctive part of Africa's living landscape, and understanding it adds depth to every sighting. This guide gathers the facts that matter most to travellers — where it lives, what it eats, how to tell it apart from similar species, and how it is coping in a changing world. Think of it as the background a good guide would share before you meet the animal in the field.

The Rhombic Night Adder is typically found in Moist grassland, savanna edges, gardens, wetlands and disturbed areas., where the vegetation, water and cover match its needs through the seasons. Its diet is built around Mostly frogs and toads, also small lizards and rodents., and those food sources shape where it spends its time and how far it must travel each day. Watching what and where an animal feeds is often the quickest way to predict where you will find it next.

The Rhombic Night Adder is most active Nocturnal or crepuscular, especially after rain., a rhythm tied to temperature, predators and the habits of its prey or grazing. In the field you can pick it out by these features: Brown to olive snake with dark diamond blotches and a V-shaped mark on the head.. Learning one or two reliable field marks lets you name it with confidence even at a distance or in poor light.

On the IUCN Red List the Rhombic Night Adder is currently assessed as Least Concern, a status that reflects both its numbers and the pressures on its range. The main threats it faces are Wetland degradation, road mortality and persecution., and these rarely act alone — habitat loss, human conflict and climate shifts tend to compound one another. Choosing responsible operators and well-managed reserves is one practical way visitors help fund its protection.

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FAQ

Where is the best place to see a Rhombic Night Adder?

The Rhombic Night Adder ranges across Eastern and southern Africa from Kenya and Tanzania south to South Africa., but distribution alone is only half the story. Your best odds come inside well-managed protected areas within that range where its preferred habitat — Moist grassland, savanna edges, gardens, wetlands and disturbed areas. — is extensive and healthy. Reserves with low vehicle traffic and experienced guiding teams consistently deliver the closest, calmest sightings.

Is the Rhombic Night Adder easy to see on safari?

That depends on how secretive the species is and how well you time your search. Because the Rhombic Night Adder is most active Nocturnal or crepuscular, especially after rain., aligning your game drives with those hours dramatically improves your chances. Travelling with a guide who knows the local individuals and their movements matters more than luck.

What should I take to help me find the Rhombic Night Adder?

A decent pair of binoculars is the single most useful tool, ideally 8x42 or 10x42 for a bright, steady image. A field guide or the SafariLingo app helps you confirm the identification and rule out look-alike species. Neutral clothing, patience and a willingness to sit quietly do the rest.

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