Reptilia · Squamata
Anilios nigrescensGray, 1845
Blackish Blind Snake
Photograph by Thomas Mesaglio, CC BY, via iNaturalist
A burrowing, nocturnal, meat-eating snake from the Australo-Pacific region, reaching 750 mm nose to tail.
Reptilia › Squamata › Typhlopidae › Anilios
- Grows to
- 750mm
- greatest recorded
- Eats
- Carnivorous
- Active
- Nocturnal
- Lives
- Fossorial
Longer than 98% of all species in Typhlopidae 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 91 to 950 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
35 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
- Extant
- Conservation status
- Least Concern
- Status assessed · the year the Red List last looked
- 2017
The animal itself
- Limbs
- None
- Colour on the back
- Brown
- Pattern on the back
- Uniform
- Venomous
- No
- Fangs
- None
Size
- Length snout to vent · greatest recorded
- 600mm23.5 in
- Length snout to vent · adult female mean
- 398mm15.5 in
- Length nose to tail · greatest recorded
- 750mm2 ft 6 in
- Body mass · greatestcomputed
- 63.67g2.2 oz
- Body mass at hatching
- 1.48g0.05 oz
750 mm total length (Feldman et al. 2016), (Webb and Shine 1992; max 600 mm in their experiments: 1. SVL and 18 adult males (mean SVL 288±30mm), 11 adult females (328±69 mm) and three juveniles (172±14 mm) experiment 2. 31 males (SVL 283± 28 ram) and 17 females (302±49mm), experiment 3. l0 adult males (SVL 287±24mm), five adult females (315±77 mm) and three juveniles (181±24 mm); experiment 4: 24 adult males (SVL+ 288±26mm) eight adult females (326±66mm) and four juveniles (120±20mm)), Shine 1994 (69 males 21.7-43.7, mean 28.6 cm SVL; 78 females 28-57.6, mean 39.8 cm SVL)
snakes only in this source
computed from length by a family-level allometric equation, not weighed
How it lives
- Diet
- Carnivorous
- How it hunts
- Active foraging
- Active
- Nocturnal
- Where it lives
- Fossorial
- Habitat
- Forest
- Biome
- Temperate Broadleaf & Mixed Forests
- Region
- Australo-Pacific
- Mainland or island
- Mainland
- Elevation · above sea level
- 8–739m
- Range size
- 788,665km²
ants and their pupae (Webb and Shine 1992), only ants (Webb and Shine 1993)
Active (Murphy et al. 2003)
Webb and Shine 1992
Cogger 2018, Murphy et al. 2003, Webb and Shine 1992
Breeding
- Reproduction
- Oviparous
- Average clutch
- 14.1eggs
- Eggs or young per clutch
- 5–20eggs
- Egg length
- 26.5mm1 in
- Egg width
- 10.7mm0.4 in
Feldman 2015
5-20 (Murphy et al. 2003), 4-20 (Chuliver and Scanferla 2023)
Naming and history
- Suborder
- Serpentes
- Infraorder
- Scolecophidia
- Subspecies
- No
- Described by
- Gray
- Moved to another genus · since it was first described
- No
- Described in
- 1845
- Type locality
- Australia
Keeping one
7 ft 10 in × 7 ft 10 in × 4 ft 11 in(240 × 240 × 150 cm)
Minimum length × width × height, for one animal. Bigger is always better. Substrate at least 12 in (30 cm) deep.
The standard sizes ground-dwelling species at 4 × 4 × 2.5 times snout-vent length.
Burrows, so substrate deep enough to dig in matters as much as floor area.
Mindestanforderungen an die Haltung von Reptilien (Sachverständigengutachten), German Federal Ministry for Nutrition, Agriculture and Forestry, Animal Welfare Division, 10 January 1997. The standard states these floor areas are recommendations rather than binding limits.
From this animal’s own snout-vent length of 23.5 in (600 mm), at 4 × 4 × 2.5 times it, following the German federal welfare standard — how this is worked out.
No preferred body temperature has been recorded for Blackish Blind Snake. Rather than repeat a number from a care sheet, this page leaves it out.
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.
8kJ per day
Worked out for an animal of 64 g, the heaviest recorded for Blackish Blind Snake — 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 male mean
- — Length snout to vent · adult mean
- — 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
- — Body mass · a typical adult
- — Body mass · adult female, mean
- — Longest recorded life
- — Preferred body temperature · chosen in a laboratory gradient
- — Body temperature when active · measured in the wild
- — Eats arthropods
- — Eats vertebrates
- — Eats plant matter
- — 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
- — Body temp in the wild · lowest mean recorded
- — Body temp in the wild · highest mean recorded
- — 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
Others in Typhlopidae
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). Anilios nigrescens. Retrieved 2026-09-08, from https://www.allanglescreatures.com/species/anilios-nigrescens
@misc{anilios_nigrescens_2026,
title = {Anilios nigrescens},
author = {{The Reptile & Amphibian Encyclopedia}},
year = {2026},
url = {https://www.allanglescreatures.com/species/anilios-nigrescens}
}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.