Varanus tristis

 

Names

Varanus tristis orientalis

Pictures

Distribution and habitat

Body characteristics

Sex

Enclosure

 

Distribution map

 

Diet

Breeding

Remarks

 

Names:

Latin name:

  • Varanus tristis.

Subspecies:

  • tristis tristis (Schlegel - 1839).
  • tristis orientalis (Fry - 1913).

Subgenus:

  • Odatria.

English name:

  • Black headed goanna (t.tristis).
  • Freckled goanna (t.orientalis).

Cites:

  • II

Distribution and habitat:


Distribution:

  • Northern Australia.

Habitat:

  • Tropical en subtropical.

Surroundings:

  • Mainly tree dweller (where available) and rock crevices.

Body characteristics:

Length:

  • 70-80 cm (V.t.tristis).
  • 50-60 cm (V.t.orientalis).

Pattern and color:

  • V.t.orientalis lack the melanistic pattern of V.t.tristis and can further be distinguished by the less spiny scales on the tail.  Both are brightly colored as hatchlings, but V.t.orientalis retain most of their young pattern while in V.t.tristis the pattern darkens and is replaced with varying amounts of black as the animals grow.    

Sex:

Sex determination:

  • Males have clusters of spines on either side of the tail base.  These spines are much reduced or absent in females.

Enclosure:

Enclosure size:

  • Advised: 1 m for a pair.

Animals per enclosure:

  • This species can be kept in small groups. 

Temperature:

  • daytime:
    • average: 22 - 27 Celsius.
    • basking: 40 - 50 Celsius.
  • night: minimum 15 Celsius.

Diet:

  • Insects, small reptiles (mainly lizards), eggs, small rodents.

Breeding:

Clutch size:

  • 6 - 17 eggs.

Incubation temperature:

  • 27 - 30 Celsius.

Incubation length:

  • 85 - 140 days.


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