Eurycantha insularis, commonly known as the Oil Palm Stick Insect, is a large, wingless phasmid native to Papua New Guinea and the Solomon Islands. It is known for its robust, bark-like appearance and is significantly more docile and easier to handle than its famous relative, the Thorny Devil (Eurycantha calcarata). 
 
Key Characteristics
Sexual Dimorphism:
Males: Measure 7–8.5 cm and are typically dark brown or black with a rough, spiny texture.
Females: Larger at 11–13 cm, they have lighter coloration and a prominent ovipositor for laying eggs in substrate.
Behavior: They are nocturnal ground-dwellers that prefer to hide under bark or wood during the day. Unlike other Eurycantha species, the males lack large, aggressive hind-leg thorns.
Diet: They are generalist herbivores, feeding on bramble, ivy, oak, rose, and hazel. 
 
Care and Breeding (PSG 111)
Habitat: A tall terrarium is necessary to allow for successful moulting. They require 70–80% humidity and temperatures between 20°C and 25°C.
Substrate: A deep layer of moist soil or peat is required for females to bury their eggs.
Incubation: Eggs take roughly 3 to 5 months to hatch, depending on environmental stability.
Agricultural Impact: In its native range, it can occasionally become a pest in oil palm plantations, causing leaf damage.