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Thorny Devil (Moloch horridus) wildlife photograph

Field guide · rare

Thorny Devil

A walking thorn bush — ant specialist that drinks dew through its skin channels.

Least Concern

Moloch horridus

Overview

Thorny devils are small Australian agamid lizards covered in sharp spines. They specialise almost entirely on ants and channel rain and dew along skin grooves to the mouth — a desert water-harvesting trick.

For Australia collectors, a thorny devil on red sand is a rare Outback card — armour, ants, and arid ingenuity.

Habitat

  • Sandy desert
  • Spinifex grassland
  • Arid shrubland

Spinifex grasslands, sandy deserts, and shrublands of arid and semi-arid Australia, especially interior Western Australia, South Australia, and the Northern Territory.

Countries found

Field notes

Field scale for the Thorny Devil: length around 15-20 cm total; weight Around 50-90 g. Typical lifespan: Around 15-20 years in the wild.

When you are scanning habitat, prioritise sandy desert, spinifex grassland, and arid shrubland. Those settings are where a clean look and a usable photo are most likely.

Quick ID anchor: Orange, brown, and tan patterned body bristling with thorns; plump belly. Confirm with behaviour and habitat before you log the discovery.

Diet

Specialist ant-eaters, licking up worker ants at trails and nests.

May take thousands of ants in a single feeding bout.

Behaviour

Slow, deliberate walk with a rocking motion; freeze when threatened.

Bask to warm up; shelter in sand or under vegetation in extreme heat.

How to identify

Orange, brown, and tan patterned body bristling with thorns; plump belly.

Small head, spiny 'false head' on the neck, and short legs.

Interesting facts

  1. 01

    Body is covered in sharp conical spines for defence.

  2. 02

    Diet is almost exclusively ants — thousands per meal.

  3. 03

    Skin grooves channel water to the corners of the mouth.

  4. 04

    Can change colour somewhat between pale and darker tones.

  5. 05

    Walk with a slow, rocking gait that may confuse predators.

  6. 06

    False head' knob on the neck may deflect attacks.

Conservation status

LC: Least Concern

Thorny devils are Least Concern across arid Australia. Feral predators and habitat change affect some areas, but the species remains widespread in suitable desert country.

Sources: IUCN Red List

Keep exploring

Where it lives

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