Thorny devil
Moloch horridus Gray, 1841
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.

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?
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?
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.
- LCLeast Concern
- NTNear Threatened
- VUVulnerable
- ENEndangered
- CRCritically Endangered
- EWExtinct in the Wild
- 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?
- kingdomAnimalia
- phylumChordata
- classReptilia
- orderSquamata
- familyAgamidae
- genusMoloch
- 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.
- An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles · CC0 1.0 · E096-269
Myhrvold, N.P., Baldridge, E., Chan, B., Sivam, D., Freeman, D.L. & Ernest, S.K.M. (2015) An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96: 3109. https://doi.org/10.1890/15-0846R.1. Data: https://doi.org/10.6084/m9.figshare.3563457.v1 - Catalogue of Life eXtended Release · CC BY 4.0 · 2026-10-16 XR
Catalogue of Life (2026). Catalogue of Life eXtended Release, version 2026-10-16 XR. Catalogue of Life Foundation, Amsterdam, Netherlands. https://doi.org/10.48580/dgzlf - Wikimedia Commons · per file (CC0 / public domain / CC BY green, CC BY-SA amber, anything else not displayed) · 2026-11-11
Wikimedia Commons contributors. Wikimedia Commons. https://commons.wikimedia.org (each file credited to its author under its own licence). - ReptTraits: a comprehensive dataset of ecological traits in reptiles · CC BY 4.0 · v1-2
Oskyrko, O., Mi, C., Meiri, S. et al. (2024) ReptTraits: a comprehensive dataset of ecological traits in reptiles. Scientific Data 11: 243. https://doi.org/10.1038/s41597-024-03079-5. Data: https://doi.org/10.6084/m9.figshare.24572683.v4 - SquamBase 1.0 - a dataset of squamate species traits · CC0 1.0 · 1.0-dryad-v5
Meiri, S. (2024) SquamBase - a database of squamate (Reptilia: Squamata) traits. Global Ecology and Biogeography 33(4): e13812. https://doi.org/10.1111/geb.13812. Data: https://doi.org/10.5061/dryad.76hdr7t3b - Wikidata · CC0 1.0 · 2026-11-11
Wikidata contributors. Wikidata. https://www.wikidata.org (data retrieved via the Wikidata Query Service). - Wikipedia (English) · CC BY-SA 4.0 · 2026-11-11
Wikipedia contributors. Wikipedia, The Free Encyclopedia. https://en.wikipedia.org (text under CC BY-SA 4.0; each block names its article and revision).
Embed a card for this animal on your own site
Copy this code. The card shows the photo with its credit, key facts and a link back to this page.
CreatureData. (2026). Thorny devil (Moloch horridus). Retrieved from https://creaturedata.com/animals/moloch-horridus
“Thorny devil (Moloch horridus).” CreatureData, 2026, https://creaturedata.com/animals/moloch-horridus.
@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}
}