Reptilia · Squamata
Cryptoblepharus egeriaeBoulenger, 1889
Christmas Island Blue-tailed Shinning-skink
Photograph placed in the public domain, CC0, via iNaturalist
A day-active, meat-eating skink from the Oriental region, reaching 52 mm snout to vent.
Reptilia › Squamata › Scincidae › Cryptoblepharus
- Grows to
- 52mm
- greatest recorded
- Eats
- Carnivorous
- Active
- Diurnal
- Lives up to
- 1.4years
Longer than only 21% of all skinks anyone has measured.
The bar is the rank itself: its length is the share of the family this animal exceeds. The chart below is the family’s real spread, on a logarithmic scale because body length here runs from 24 to 500 mm. The solid rule is this animal. Every bar is a count of real species, and nothing on this figure is estimated.
What is known
29 sourced facts, each taken from a named scientific dataset. How to read these.
Cited from a dataset unless a row is marked otherwise.
Standing in the world
- Still living
- Extinct in the wild
- Conservation status
- Extinct in the Wild
- Status assessed · the year the Red List last looked
- 2017
The animal itself
- Limbs
- Four legs
- Venomous
- No
- Fangs
- None
- Longest recorded life
- 1.4years
- Body temp in the wild · mean, when active
- 29.7°C
Emery, Agius, and Woinarski, 2018. Conservation options for Christmas Island's blue-tailed skinks. In Threatened Species Recovery Hub
body temperature of active animals in nature
Size
- Length snout to vent · greatest recorded
- 52mm2 in
- Body mass · greatestcomputed
- 2.73g0.1 oz
max 52 mm SVL (Feldman et al. 2016)
computed from length by a family-level allometric equation, not weighed
How it lives
- Diet
- Carnivorous
- Active
- Diurnal
- Where it lives
- Arboreal, saxicolous
- Habitat
- Forest
- Biome
- Tropical & Subtropical Moist Broadleaf Forests
- Region
- Oriental
- Mainland or island
- Found only on islands
- Highest it lives · above sea level
- 361m
- Range size
- 137km²
Arthropods (see "Sources (general)")
e.g., Rodda 2020
Saxicolous and Arboreal (see Sources (general) column)
Breeding
- Reproduction
- Oviparous
- Average clutch
- 2eggs
- Eggs or young per clutch
- 2eggs
Naming and history
- Suborder
- Sauria
- Infraorder
- Scincoidea
- Subspecies
- No
- Described by
- Boulenger
- Moved to another genus · since it was first described
- Yes
- Described in
- 1889
- Type locality
- Australia (Christmas Island)
Keeping one
Christmas Island Blue-tailed Shinning-skink is assessed as Extinct in the Wild on the IUCN Red List. It survives only in managed conservation breeding, if at all — these animals are not in the pet trade, and the figures below are what a published welfare standard sets for the species rather than an invitation to keep one.
No enclosure size, temperature or feeding figure is given for this species. What is recorded about the animal stays on this page above; advice on keeping one does not, because there is none to keep.
Feeding
A prey item should be no wider than the space between the animal's eyes.
Widely used across reptile husbandry references. The stated reason is that the gap approximates the width of the throat, so wider prey is associated with impaction. This is established practice, not a measurement.
0kJ per day
Worked out for an animal of 3 g, the heaviest recorded for Christmas Island Blue-tailed Shinning-skink — so it is the top of the range, not a figure for a particular animal. Weigh yours and the number will be lower.
An upper estimate, not a feeding target, and not veterinary advice. The equation covers only what an animal burns staying alive, so a growing, gravid or recovering animal needs more — and it was measured on wild animals, which move far more than one in an enclosure. Body condition and a vet who knows the species are what a feeding decision should rest on. Where this comes from.
What nobody knows
These are not gaps in our research. No scientific dataset records them for this species — and saying so is information you cannot get from a reference that simply leaves a field out.
- — Length snout to vent · adult female mean
- — Length snout to vent · adult male mean
- — Length snout to vent · adult mean
- — Length nose to tail · greatest recorded
- — Female length · mean, nose to tail
- — Length nose to tail · adult male mean
- — Length nose to tail · adult mean
- — Largest female · snout to vent
- — Largest male · snout to vent
- — Largest female · shell length
- — Largest male · shell length
- — Hatchling length · snout to vent
- — Hatchling length · nose to tail
- — Largest juvenile · snout to vent
- — Largest juvenile · shell length
- — Egg length
- — Egg width
- — Body mass · a typical adult
- — Body mass · adult female, mean
- — Body mass at hatching
- — Preferred body temperature · chosen in a laboratory gradient
- — Body temperature when active · measured in the wild
- — Eats arthropods
- — Eats vertebrates
- — Eats plant matter
- — How it hunts
- — How the young develop
- — Gestation or incubation
- — Mean clutch · smallest reported
- — Mean clutch · largest reported
- — Clutches in a year
- — Clutches a year · fewest
- — Clutches a year · most
- — First breeds from · youngest recorded
- — First breeds by · oldest recorded
- — Hatchling length · smallest recorded
- — Hatchling length · largest recorded
- — Age at first breeding · female
- — Mature from · youngest recorded
- — Mature by · oldest recorded
- — Size at maturity · smallest recorded
- — Size at maturity · largest recorded
- — Colour on the back
- — Pattern on the back
- — Pupil
- — Sex decided by
- — Population trend
- — Red List criteria
- — Active season · shortest recorded
- — Active season · longest recorded
- — Density · lowest recorded
- — Density · highest recorded
- — Home range · largest recorded
- — Active in
- — Lowest it lives · above sea level
Others in Scincidae
Take this data
Everything on this page is available as data under CC BY 4.0 — use it freely, credit it, no permission needed.
This species as JSON · the whole dataset
Cite this page
The Reptile & Amphibian Encyclopedia (2026). Cryptoblepharus egeriae. Retrieved 2026-09-08, from https://www.allanglescreatures.com/species/cryptoblepharus-egeriae
@misc{cryptoblepharus_egeriae_2026,
title = {Cryptoblepharus egeriae},
author = {{The Reptile & Amphibian Encyclopedia}},
year = {2026},
url = {https://www.allanglescreatures.com/species/cryptoblepharus-egeriae}
}Sources
- Meiri, S. (2024). SquamBase — a database of squamate (Reptilia: Squamata) traits. Global Ecology and Biogeography. Public domain (CC0).
- Oskyrko, O. et al. (2024). ReptTraits: a comprehensive dataset of ecological traits in reptiles. Scientific Data. Used under CC BY 4.0.
- Catalogue of Life (dataset 3LR), used under CC BY.
- Moura, M. R. et al. TetrapodTraits: a database of 33,281 tetrapod species. Used under CC BY 4.0. Observed values only; this encyclopedia does not publish its imputed predictions.