Tribolonotus gracilis

Red-eyed Crocodile Skink

Tribolonotus gracilis (De Rooij, 1909)

Basic info

Common names
  • Crocodile Skink
  • Red-eyed Crocodile Skink
Species nameTribolonotus gracilis
Scientific nameTribolonotus gracilis De Rooij, 1909
Tribolonotus gracilis
Max SVL 3.8 inch

Further Reading

Temperatures & Season

Day time temperatures

Background23 - 28 °F
Basking spot28 - 32 °F

Night time temperatures

Background23 - 25 °F


Photoperiod12 hours


Microhabitats are specific small habitats that an organism inhabits within its broader environment. These can vary greatly depending on the species and can give us insights into the preferred living conditions of each reptile. Understanding these microhabitats can be key to providing the correct care for these animals in captivity.

  • Fossorial
  • Leaf litter
    Leaf litter
  • Forest floor
    Forest floor
  • Riparian or wetlands
    Riparian or wetlands

Ferguson Zones

Ferguson Zones are a way to classify the amount of UV light that reptiles are exposed to in their natural habitats. These zones help us understand and replicate their natural light conditions in captivity, promoting the health and wellbeing of the reptiles. Below, we detail the specific Ferguson Zones of the Chinese Water Dragon, along with recommendations for replicating these conditions

The Ferguson Zone in which the Red-eyed Crocodile Skink has been placed has been chosen based upon an assessment of its typical basking behaviour and likely microhabitat in the wild.

Crepuscular or share dweller
UVI range avarage: 0-0.7, UVI max recorded: 0.6-1.4

Recommended lighting methods in captivity

Shade method

This method provides low-level 'background' UV at levels matching the Ferguson Zone Range, over a large portion of the enclosure. The highlighted area in the table below represents this range for the Red-eyed Crocodile Skink.


More in-depth information about Ferguson zones can be found here: https://jzar.org/jzar/article/view/150

Community collected distribution (303 occurrences)


These are the biomes the Red-eyed Crocodile Skink was found in. Click here to learn more about terrestrial ecoregions and biomes.

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  1. Baines, F.M., Chattell, J., Dale, J., Garrick, D., Gill, I., Goetz, M., Skelton, T. and Swatman, M. 2016. How much UVB does my reptile need? The UV-Tool, a guide to the selection of UV lighting for reptiles and amphibians in captivity. Journal of Zoo and Aquarium Research. 4, 1 (Jan. 2016), 42–63. DOI:https://doi.org/10.19227/jzar.v4i1.150.
  2. Tribolonotus gracilis De Rooij, 1909 in GBIF Secretariat (2021). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org
  3. De Rooij, & De, N. Reptilien (Eidechsen, Schildkröten und Krokodile).
  4. Blackwell, Publishing & Ltd, & Meiri, Shai. (2008). Evolution and ecology of lizard body sizes. Global Ecology and Biogeography. 17. 724-. 10.1111/j.1466-8238.2008.00414.x.
  5. iNaturalist. Available from https://www.inaturalist.org
This website is created by Jefrim Keijzer | All species