Nile Monitor
(Varanus niloticus)

Habitat
: African river basins    Diet: Insectivore/Carnivore    Adult Size: 4-7.5 feet  
Lifespan
: 10-20 years    Native To: Africa 

Did You Know:

  • Like all Monitors, the Nile Monitor has a forked tongue and highly developed sense of smell

  • Nile Monitors are highly aquatic, but have sharp claws that make them excellent runners and climbers on land

  • In South Africa, they are called “leguaan,” which is Dutch for iguana
     

Caution: These pets are not recommended for anyone who is not a very experienced reptile keeper.

The material below is a general guideline, and is not intended to serve as your sole source of pet care information. Visit a veterinarian trained in caring for reptiles and consult a broad range of literature to ensure that your pet receives adequate care.
 

Things You Should Know About The Nile Monitor

The Basics:

Nile Monitors are large, intelligent lizards with powerful jaws, raking claws and lashing tails that tend to have aggressive temperaments. This makes them ill-suited for anyone but an experienced reptile keeper. Nile Monitors are illegal to own in some states without a license. There are two variations of Nile Monitors in the wild – the Nile Monitor, which has five torso bands, and the Ornate Nile Monitor, which has seven. The Ornate Monitor also tends to be brighter in color and smaller in size than the Nile Monitor, and is restricted to the southernmost sections of its natural habitat

Enclosure:

Nile Monitors should be kept in large, spacious enclosures measuring at least twice the length of the lizard on all sides. Niles need high humidity, so avoid wire mesh enclosures. They need a very secure enclosure that retains humidity. Niles enjoy a variety of branches or elevated shelves for basking and logs, sticks, tree limbs, half logs, rocks and cork bark slabs on which to climb. They also require a water receptacle large enough in which to submerse themselves. It should be sturdy and not easily tipped over.

Substrate:

There should be at least enough substrate (about two feet) for the Nile Monitor to burrow and make tunnels. Deeper substrate also helps to retain moisture and regulate humidity. Recommended substrates include dirt, reptile bark, cypress, Aspen bedding, or proprietary lizard litter.

Temperature: Nile Monitors should be provided with a thermal gradient of about 85˚ to 90˚ Fahrenheit with a basking area of 120˚ Fahrenheit. Night time temperatures can drop to the low 70’s. Nile Monitors do not need high humidity; levels of about 50-75% are ideal. This can be accomplished by misting and providing a few localized humid areas. Important – see the Note About Day/Night Cycles and Heating below.

Lighting:

Nile Monitors require full spectrum lighting with 5 ˝ UVB, and ample space for basking. They need a 12-hour light/dark cycle. Night lighting will make for better viewing of the Nile Monitor’s activities. Important - see the Note About Day/Night Light Cycles and Heating below.

Note About Day/Night Light Cycles and Heating:

All reptiles, including this pet, must have distinct day and night periods in their enclosure to maintain their biological rhythms. (See the lighting entry above for the specific length of this animal’s day/night cycle.) The day period must be light; and night must be dark. A timer should be used to set day/night periods. If a heat source is required to maintain correct nighttime temperatures, use heat mats or strips mounted below or on the side of the tank, infrared heat lamps, ceramic heat emitters, or a combination of these products. This will allow the enclosure to be heated while remaining dark. Follow directions carefully with all products. If ceramic heat emitters are used, always choose fixtures with porcelain or ceramic sockets and to protect against fires do not place them by dry wood or flammable fabrics. Ceramic heat emitters must be kept out of the reach of children and all pets, including dogs and cats.

Diet: Babies and young can be fed various insects, small fish, and appropriately-sized newborn rodents. Adults can be fed shellfish, mollusks, fish, chicks, mice or rats. They may also be given vertebrate and invertebrate prey, crickets, mealworms and roaches, lean ground turkey, cooked eggs, canned dog food and raw beef heart. Babies should be fed daily and adults daily to every other day. Watch for obesity, since they are always hungry and will generally take anything offered. It is necessary to provide calcium and vitamin supplements as part of the diet. Please read the supplement section below:
Supplements: Rodents fed to this animal do not need to be dusted with any supplements. If this animal is given insects as any part of its diet, our veterinarian offers this advice. Dust insects with a plain calcium supplement every time they are given offered to the pet. (Avoid using a calcium supplement with added phosphorous, unless specifically directed by your veterinarian, since this can promote kidney disease.) Also dust insects with a D3 supplement once a week and a vitamin supplement two times a month.  As a rule, a growing juvenile's food should be dusted more often than an adult's. Follow product label directions when applying supplements, and avoid over-supplementing food. This is only one recommendation, consult your veterinarian for specific directions on supplementing your pet’s food, since there are many variables that go into determining the best supplementing regimen for a given animal.
Water: Fresh, chlorine-free water should be available at all times. Do not use tap water unless it has been treated with a conditioner to neutralize chlorine and heavy metals. Do not use distilled water. Nile Monitors have a tendency to soak and defecate in their water, so it should be checked and replaced as needed. This lizard must be provided with a water pool that is large enough to allow it to submerge its whole body.
A NOTE ABOUT WATER: All water given to this pet for drinking, as well as water used for misting, soaking or bathing must be 100% free of chlorine and heavy metals. (Not all home water filtration systems remove 100% of the chlorine and heavy metals from tap water, so check your system's specifications before using it to filter water for your pet.) We recommend that you use unflavored bottled drinking water or bottled natural spring water and never untreated tap water. If tap water is used, you should treat it with a dechlorinating treatment. Do not use distilled water, which can cause severe medical problems, since it lacks minerals that are essential to important body functions.


How to Handle A Nile Monitor
Nile Monitors can be very aggressive and therefore handling by an inexperienced herpetologist is not recommended. However, if acquired at a very young age, a Nile Monitor can be tamed with daily handling, a lot of hard work, diligence and patience. When holding make sure to support body and legs and secure tail. This lizard will bite. A large towel should be used for handling.


Look Out For This:

Although native to Africa, Nile Monitors have been found in Florida, most likely the result of pets being released into the wild. They are considered an invasive species in Florida, where they are potentially dangerous to humans and their domestic pets.


Recommended Nile Monitor Supplies:

  • Enclosure

  • Substrate

  • Chlorine-free water source

  • Appropriate heat source

  • Water dish

  • Appropriate food

  • Furnishings and hide area

  • Hygrometer

  • UVB light source

  • Thermometers

  • Supplements

  • Book on Lizard care