CreatureData

Thorny devil

Moloch horridus Gray, 1841

LCLeast Concernlizards

The thorny devil (Moloch horridus), also called thorny dragon, thorny lizard or mountain devil, is a lizard in the family Agamidae, subfamily Amphibolurinae. It is a small reptile with an adult body mass from 20.4 to 25.9 g, a representative mass of 23.15 g and a body length of 9.257 cm.

Thorny devil (Moloch horridus)
Photo: User:Bäras · CC BY-SA 3.0 · Wikimedia Commons

Quick facts about the thorny devil

Our sources give 7.1 young per litter or eggs per clutch, with 1 litter or clutch per year. The IUCN Red List assesses the thorny devil globally as Least Concern (LC), which is not a threatened category.

Weight
20.4 g – 25.9 gsrc for Weight
Length
9.26 cm – 10.6 cmsrc for Length
Lifespan
Not recorded
Diet
Carnivoresrc for Diet
Longest recorded lifespan
20 years
Main food
Not recorded
Habitat
desert, shrublandsrc for Habitat
Young per litter or clutch
3 – 10src for Young per litter or clutch
Age at maturity
12 months – 3 yearssrc for Age at maturity
Litters or clutches a year
1 – 2src for Litters or clutches a year
Reproduction
Eggssrc for Reproduction
Active
By day (diurnal)src for Active
Lifestyle
Terrestrialsrc for Lifestyle
Conservation status
Least Concern (IUCN)src for Conservation status
Countries on record
Not recorded

How big is the thorny devil?

THORNY DEVIL · LENGTH 10.6 CMADULT HUMAN · HEIGHT 1.7 M
At 10.6 cm, the recorded maximum length of the thorny devil is about 6.2% of the height of an adult human (1.7 m, a fixed reference used for scale).

Photos of the thorny devil

Only freely licensed photos are shown. Each carries its creator and licence.

Where does the thorny devil live?

Not recorded

What is the thorny devil?

Quoted from WikipediaCC BY-SA 4.0

The thorny devil (Moloch horridus), also known commonly as the mountain devil, thorny lizard, thorny dragon, and moloch, is a species of lizard in the family Agamidae. The species is endemic to Australia. It is the sole species in the genus Moloch. It grows up to 21 cm (8.3 in) in total length (including tail), with females generally larger than males.

From the Wikipedia article “Thorny devil” (en.wikipedia.org/w/index.php?title=Thorny_devil&oldid=1369647062), by Wikipedia contributors, licensed under CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0). This block is kept separate from our own text.

Is the thorny devil endangered?

The thorny devil is listed as Least Concern on the IUCN Red List: it is not currently at risk of extinction.

  1. LCLeast Concern
  2. NTNear Threatened
  3. VUVulnerable
  4. ENEndangered
  5. CRCritically Endangered
  6. EWExtinct in the Wild
  7. EXExtinct

Category via Wikidata (CC0). Find the full assessment on the IUCN Red List. See all Least Concern species. What the categories mean.

How is the thorny devil classified?

  1. kingdomAnimalia
  2. phylumChordata
  3. classReptilia
  4. orderSquamata
  5. familyAgamidae
  6. genusMoloch
  7. SpeciesMoloch horridus Gray, 1841

Synonyms Acanthosaurus gibbosus

Other names and names in other languages (47)
  • Mountain devilEnglish
  • Thorny dragonEnglish
  • Thorny lizardEnglish
  • الشيطان الشائكArabic
  • diañu espinosuAsturian
  • Diaoul kornekBreton
  • diable espinósCatalan
  • moloch ostnitýCzech
  • MolochGerman
  • DornteufelGerman
  • WüstenteufelGerman
  • Dorna diabloEsperanto
  • móloc hórridoSpanish
  • Diablillo espinosoSpanish
  • Diablo EspinosoSpanish
  • Diablo-espinosoSpanish
  • شیطان خاردارPersian
  • PiikkipiruFinnish
  • Diable cornuFrench
  • Moloch hérisséFrench
  • מולך קוצניHebrew
  • Tüskés ördögHungarian
  • Kadal berduriIndonesian
  • トゲトカゲJapanese
  • モロクトカゲJapanese
  • მოლოქიGeorgian
  • МолохтарKazakh
  • مولوحتارKazakh
  • MoloxtarKazakh
  • Ejdehayê strîdarKurdish
  • Тикендүү кескелдирикKyrgyz
  • DärendäiwelLuxembourgish
  • മുള്ളൻ ചെകുത്താൻMalayalam
  • Nahatʼeʼiitsoh Bikéyahdę́ę́ʼ naʼashǫ́ʼii dichʼízhiiNavajo
  • torndjevelNorwegian Bokmål
  • bergduivelDutch
  • Moloch kolczastyPolish
  • Moloch straszliwyPolish
  • diabo-espinhosoPortuguese
  • Dragão-espinhosoPortuguese
  • МолохиRussian
  • trnasti hudičSlovenian
  • Молох гмизавацSerbian
  • MolokTurkish
  • МолохUkrainian
  • Thằn lằn quỷ gaiVietnamese
  • 澳洲魔蜥Chinese

Catalogue of LifeWikipediaiNaturalistITISWikidataIUCN Red List

Relatives of the thorny devil

Other species in the same genus Moloch.

CompareThorny devil vs Moloch browniThorny devil vs Moloch granti

Common questions

Each answer is written from the sourced facts on this page, and only where they hold the answer.

What kind of animal is a thorny devil?

The thorny devil is a lizard, a reptile in the family Agamidae and the order Squamata.

How heavy is a thorny devil?

Adult thorny devils weigh from 20.4 to 25.9 g, with a representative value of 23.15 g.

How big is a thorny devil?

The thorny devil has a body length of 9.257 cm and falls in the small size class, defined by adult body mass of 10 g to 1 kg.

Is the thorny devil endangered?

No. The IUCN Red List assesses it globally as Least Concern (LC), which is not a threatened category.

How many young does a thorny devil have?

Our sources give 7.1 young per litter or eggs per clutch, with 1 litter or clutch per year.

What is the scientific name of the thorny devil and who named it?

The scientific name is Moloch horridus, named by Gray, 1841.

What other names does the thorny devil have?

It is also called thorny dragon, thorny lizard and mountain devil.

Sources and how to cite this page

Data as of 2026-11-11. How this page is put together.

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APA

CreatureData. (2026). Thorny devil (Moloch horridus). Retrieved from https://creaturedata.com/animals/moloch-horridus

MLA

“Thorny devil (Moloch horridus).” CreatureData, 2026, https://creaturedata.com/animals/moloch-horridus.

BibTeX
@misc{moloch_horridus_2026,
  title = {Thorny devil (Moloch horridus)},
  author = {{CreatureData}},
  year = {2026},
  url = {https://creaturedata.com/animals/moloch-horridus},
  note = {Data as of 2026-11-11}
}