Reptilia · Squamata
Acanthophis praelongusRamsay, 1877
Northern death adder
Photograph by dhfischer, CC BY, via iNaturalist
A ground-dwelling, nocturnal, meat-eating snake from the Australo-Pacific region, reaching 700 mm nose to tail.
Reptilia › Squamata › Elapidae › Acanthophis
- Grows to
- 700mm
- greatest recorded
- Eats
- Carnivorous
- Active
- Nocturnal
- Lives up to
- 15years
Longer than only 31% of all elapid snakes 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 219 to 5,710 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
37 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, Red
- Pattern on the back
- Banded
- Pupil
- Vertical slit
- Venomous
- Yes
- Fangs
- At the front of the mouth
- Longest recorded life
- 15years
- Preferred body temperature · chosen in a laboratory gradientmeasured
- 30°C
Size
- Length nose to tail · greatest recorded
- 700mm2 ft 4 in
- Hatchling length · nose to tail
- 140mm5.5 in
- Body mass · greatestcomputed
- 106.9g3.8 oz
- Body mass at hatchingmeasured
- 2.63g0.09 oz
snakes only in this source
computed from length by a family-level allometric equation, not weighed
How it lives
- Diet
- Carnivorous
- How it hunts
- Sit and wait
- Active
- Nocturnal
- Where it lives
- Terrestrial
- Habitat
- Forest, Shrubland
- Biome
- Tropical & Subtropical Grasslands, Savannas & Shrublands
- Region
- Australo-Pacific
- Mainland or island
- Mainland
- Elevation · above sea level
- 9–927m
- Range size
- 176,739km²
vertebrates (see Shine et al. 2014), frogs, lizards, mammals (Eipper and Eipper 2022)
Sit (Mirtschin et al. 2017, Eipper and Eipper 2022)
Diurnal (Hu et al. 2020), nocturnal (Eipper and Eipper 2022)
Mirtschin et al. 2017
Breeding
- Reproduction
- Viviparous
- Sex decided by
- Genes, ZW/ZZ
- Average clutch
- 23.1eggs
- Eggs or young per clutch
- 6–24eggs
- Mean clutch
- 12–23.1eggs
(Feldman et al. 2015, Meiri et al. 2019), ovoviviparous (Cogger 2018)
mean 23.1 (Meiri et al. 2019), mean looks like ~14 in Figure 4 of Shine et al. 2014, 6-17, mean 12
Naming and history
- Suborder
- Serpentes
- Infraorder
- Alethinophidia
- Subspecies
- No
- Described by
- Ramsay
- Moved to another genus · since it was first described
- No
- Described in
- 1877
- Type locality
- Australia
Keeping one
2 ft 4 in × 14 in × 20.5 in(70 × 35 × 53 cm)
Minimum length × width × height, for one animal. Bigger is always better.
The standard sizes snakes as a fraction of total length: 1 × 0.5 × 0.75.
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 total length of 2 ft 4 in (700 mm), at 1 × 0.5 × 0.75 times it, following the German federal welfare standard — how this is worked out.
In a laboratory thermal gradient this species settled at 86 °F (30 °C).
Preferred body temperature, recorded in a laboratory gradient where the animal could choose freely. A measurement of the animal, not a setting for a thermostat.
Feeding
A prey item should be between the same width as the widest part of the snake's body and about 1.5 times that width.
Widely used across snake husbandry references. An alternative formulation gives prey at 10-15% of the snake's body mass. This is established practice, not a measurement.
12kJ per day
Worked out for an animal of 107 g, the heaviest recorded for Northern death adder — 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 · greatest recorded
- — Length snout to vent · adult female mean
- — 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
- — Largest juvenile · snout to vent
- — Largest juvenile · shell length
- — Egg length
- — Egg width
- — Body mass · a typical adult
- — Body mass · adult female, mean
- — Body temperature when active · measured in the wild
- — Eats arthropods
- — Eats vertebrates
- — Eats plant matter
- — How the young develop
- — Gestation or incubation
- — 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
- — 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 Elapidae
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). Acanthophis praelongus. Retrieved 2026-09-08, from https://www.allanglescreatures.com/species/acanthophis-praelongus
@misc{acanthophis_praelongus_2026,
title = {Acanthophis praelongus},
author = {{The Reptile & Amphibian Encyclopedia}},
year = {2026},
url = {https://www.allanglescreatures.com/species/acanthophis-praelongus}
}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.