🌵 Giant prickly stick insect

📊Overview

A large, charismatic Australian species whose females curl their spiny abdomen up like a scorpion as a harmless bluff, making it a favourite display insect. The bluff is fake, but a clamped female's spiny hind legs can still give a sharp pinch, and it needs more warmth and humidity than the simplest beginner species.

⚡Ownership snapshot

🧭Temperament & needs

📈Compared with other Stick insects

🧠Personality & temperament

The giant prickly, or Macleay's Spectre, is the showpiece of the phasmid hobby — a large, thorn-covered, leaf-like insect that curls its spiny abdomen up over its back in a dramatic scorpion-style pose when startled. Despite the fierce look it is a harmless, placid bluffer that tolerates gentle handling better than most stick insects. Females are big and bulky, while the smaller males are winged and can flutter about, giving the two sexes quite different characters to keep.

📜Origin & background

Extatosoma tiaratum is native to the wet forests of eastern Australia (Queensland and New South Wales) and parts of New Guinea. It is one of the most widely kept phasmids in the hobby around the world.

🏃Exercise & enrichment

Moderately active for a stick insect, it climbs and browses through the branches at night and appreciates a tall, well-furnished enclosure with plenty of criss-crossing twigs to explore. Newly hatched nymphs are fast, ant-mimicking runners and need secure climbing structure from day one.

✂️Grooming & hygiene

Mist the enclosure daily to keep humidity up and provide drinking droplets, and refresh foodplant while clearing frass and eggs from the floor. Good height and moisture are the essential moult-support 'grooming' for such a large-bodied insect.

🍽️Diet & feeding

Eats eucalyptus (its natural food), bramble, oak, raspberry and salmonberry, with bramble the easiest year-round staple in most regions. Keep a fresh cut stem in plugged water and replace it roughly twice a week as it wilts.

🏠Housing & environment

Give this large species real height — an enclosure at least three times the adult female's body length tall (around 45-60 cm) so she can hang fully extended to moult. Maintain 20-27°C and moderate-to-high humidity via daily misting, with good ventilation to prevent stagnant, mouldy air. Stand foodplant in water and use a substrate or paper floor that lets you find the large, seed-like eggs.

🩺Health & lifespan

The commonest problem is a botched moult — too little height or humidity leaves the heavy female with deformed or trapped legs, which is often fatal in an adult that can no longer regenerate. Excess damp with poor airflow invites mould and fungal issues, while too dry a setup causes incomplete sheds. With good husbandry adults live roughly 12-18 months, and the shorter-lived males typically die before the females.

🎓Training & socialization

One of the few phasmids genuinely tolerant of careful handling, it will sit and walk on a hand, but the female's body spines are sharp and large individuals grip firmly, so let it step on and off rather than pulling it free. Move slowly and keep it low over a surface, as a startled insect may drop or curl its abdomen.

💰Cost of ownership

Set-up is modest: a tall mesh or glass terrarium, a spray bottle and a water vial, plus a handful of nymphs, with foliage usually foraged for free. Ongoing costs are low — mainly replacement bramble and occasional supplemental heat in a cool home.

💚Who it's good for

Keepers wanting a big, handleable showpiece with real presence and personality.

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