Reptoria

Negros water monitor (Varanus nuchalis)

Negros water monitor (Varanus nuchalis), typical appearance of the species

Monitors & tegus · Difficulty: Intermediate

Key facts and care guidance for Negros water monitor (Varanus nuchalis) (origin: The central Philippines (Negros, Panay, Cebu)). Adult size around 120–150 cm total length. Life expectancy 15–20 years. The values below are carefully researched guidance.

Short answers

Negros water monitor: How big does the enclosure need to be?

250×120×150 cm.

Negros water monitor: What temperature does it need?

Daytime 28–34 °C, basking spot 45 °C, at night 22–25 °C.

Negros water monitor: Does it need UVB lighting?

UVB: Essential (UVB 10.0–12 %).

Negros water monitor: How long do they live?

Life expectancy: 15–20 years.

Negros water monitor: Is it suitable for beginners?

Rather not – it is considered an intermediate species (difficulty: Intermediate).

Climate

Daytime temperature
28–34 °C
Night temperature
22–25 °C
Basking spot
45 °C
Humidity
65–80 %
UVB
Essential (UVB 10.0–12 %)

Enclosure

Minimum size
250×120×150 cm
Substrate
Soil and bark mulch, sturdy climbing branches, a large water section

Feeding

Food
Insects, roaches, fish, rodents, eggs
Feeding interval
2×/week

Key facts

Adult size
120–150 cm total length
Life expectancy
15–20 years
Origin
The central Philippines (Negros, Panay, Cebu)
Protection status
CITES II; export from the Philippines is prohibited
Brumation
None
Cohabitation
Keep them singly. Monitors and tegus are territorial; grown animals defend their territory and injure each other with serious bites in the process. Even small size differences mean one animal claims the warm spot and the food for itself while the other falls behind — which is often only noticed once the weaker animal has already lost weight. For breeding, put them together only under supervision.

Notes

A boldly marked water monitor with striking pale nape scales. It swims and climbs equally well – it needs a water section and climbing structure.

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Related species

All species in the care wiki →

What you need to start

To keep Negros water monitor (Varanus nuchalis) you typically need: a suitable enclosure (250×120×150 cm), substrate (Soil and bark mulch, sturdy climbing branches, a large water section), a heat source with a thermostat, UVB lighting, thermometer and hygrometer, a water dish and hides. You will find equipment in the Reptoria marketplace.

The complete, interactive care database is in the Reptoria app.

Last updated: 9 October 2026 · Editor: Reptoria editorial team · Sources include: https://en.wikipedia.org/wiki/Large-scaled_water_monitor, https://reptile-database.reptarium.cz/species?genus=Varanus&species=nuchalis

All values are non-binding guidance and do not replace expert advice. Research thoroughly from several sources before acquiring and keeping an animal, and observe the applicable law (species and animal protection in particular).