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Indian Stick Insect
Carausius morosus
The Carausius morosus, or Indian Stick Insect. It is the 'laboratory' and primary school phasmid par excellence: the most widespread species in the world in captivity since the 19th century. Morphologically similar to the Medauroidea (it is a thread-like green-brown twig), it is distinguished by two bright 'red patches' at the root of the front legs (in adult specimens). It is a creature of astounding biological resilience: it feeds on Ivy and Bramble at a frantic pace, and is famous for being 99.9% parthenogenetic. A single female specimen will give rise, laying hundreds of very hard ovoid eggs, to a self-sufficient colony identical in all respects to the mother. Very docile, nocturnal and very easy to maintain even in the winter months (thanks to the ivy).
- Taxonomy
- Class:InsectaOrder:PhasmidaFamily:LonchodidaeGenus:CarausiusSpecies:Carausius morosus
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Environment
Terrestrial
Humidity
60 - 70 %
Day temperature
20 - 24 °C
Night temperature
15 - 18 °C
UVB
None
Species description
Geographic Origin and Habitat: The PSG entry lists India, Tamil Nadu as the locality for Carausius morosus; it does not characterize habitat conditions.
Taxonomy and Genetics: The entry identifies Carausius morosus and does not provide genetic results.
Behaviour and Habits: It records parthenogenetic reproduction in culture and assumes sexual reproduction in the wild.
Morphology and Sexual Dimorphism: The cited entry supplies no morphological description or sex-dimorphism measurements.
Care, breeding and tankmates
Terrarium Setup: The Phasmid Study Group sheet for Carausius morosus says the cage should be at least 24 cm tall and have at least two ventilated sides; it lists room temperature.
Lighting and Heating: The cited sheet lists room temperature and does not provide a quantified lighting schedule.
Humidity and Hydration: The sheet says to spray the cage lightly every other day, enough for insects to drink and to help keep humidity up; it does not state a numerical humidity target.
Feeding and Supplementation: The sheet lists Privet, Ivy, Hawthorn, Pyracantha, Bramble, Rose, Raspberry, Oak and Hazel as usual foodplants. It gives no supplementation protocol.
Compatibility and Coexistence: The cited sheet provides no cohabitation recommendation.
Health and Common Diseases: The cited sheet provides no disease or veterinary-treatment evidence.
Geographic Origin and Distribution
This species originates from: Asia Meridionale (Boschi tropicali, arbusti e giardini in India Meridionale).
Origin
Selective breeding and cultivarsSouth and Southeast Asia
Terrestrial invertebrate profile
- Diet
- Herbivore
- The diet of Carausius morosus requires careful consideration to ensure optimal health. In captivity, a varied and appropriately sized selection of food items is necessary to mimic their natural intake. Keepers must provide a balanced feeding schedule and consider nutritional supplements. Proper hydration alongside the diet is also crucial for their digestion. Understanding these dietary needs is fundamental to successful husbandry.
- Adult size
- 10 cm
- The catalog's scalar value is 10 cm. The Phasmid Study Group — PSG 1 source reports a maximum adult measurement of 10 cm for this species, recorded as total length (TL). The taxonomic record consulted is Carausius morosus. These figures are not interchangeable: the first is the profile's editorial reference, whereas the second is a published maximum under a specific measurement convention; differences among sources can reflect sex, population, life stage and measuring method.
- Lifestyle/Microhabitat
- Arboreal
- The lifestyle of Carausius morosus is perfectly suited to its natural habitat, dictating its physical and spatial needs. Whether they are climbers, burrowers, or ground-dwellers, their enclosure must reflect these requirements. Providing ample space and correct structural elements is necessary to accommodate their daily routines. A proper setup not only ensures physical health but also encourages natural exploration. Simulating their native lifestyle is the cornerstone of excellent husbandry.
- Activity cycle
- Nocturnal
- The activity pattern of Carausius morosus is closely linked to natural diurnal or nocturnal cycles. They exhibit peak periods of movement and foraging that align with their instinctual rhythms. Maintaining a consistent day-night light cycle in their enclosure is essential for their health. Disruptions to this routine can cause lethargy and affect their feeding response. A well-regulated environment ensures they remain active and healthy.
- Sociality
- Gregarious
- Carausius morosus is a communal species that exhibits no aggression or cannibalistic behavior. They can be safely kept in large groups. Keeping high population densities is common, but sufficient fresh food and space for molting must be monitored to prevent accidental leaf-nibbling injuries.
- Reproduction
- The reproductive processes of Carausius morosus are fascinating and require specific environmental cues. Successful breeding often depends on precise temperature, humidity, and lighting adjustments. Mating behaviors can be complex, requiring careful observation to ensure the safety of the animals. Once successful, proper care for the resulting eggs or offspring is paramount. Dedicated breeders can achieve rewarding results by mimicking their natural habitat.
- Venom level
- Harmless
- Indian stick insects are completely non-venomous and lack any defensive weaponry. They do not bite or sting. Their defense relies totally on their cryptic appearance, their ability to remain motionless (catalepsy), and occasionally dropping to the ground when startled.
- Handling tolerance
- Tolerant
- Handling Carausius morosus should be approached with caution, respect, and proper technique. Unnecessary manipulation can induce stress, so it is best kept to a minimum or during essential health checks. When handling is required, slow and supportive movements are crucial to prevent injury. Ensuring a safe, calm environment during these brief periods protects both the animal and the handler. Always observe the animal's body language to gauge its comfort level.
- Brumation
- Not required
- The brumation or resting period for Carausius morosus is an important biological phase tied to seasonal changes. During this time, they may exhibit a significant decrease in activity and appetite. Keepers should carefully research the specific environmental triggers needed to safely induce and end this phase. Monitoring weight and overall condition before and during brumation is vital. This resting period often plays a key role in their long-term health and reproductive success.
- Molting
- Regular
- The shedding or molting phase is a delicate time for Carausius morosus that requires specific environmental conditions. Maintaining adequate humidity is essential to help them shed their old skin completely and without complications. Retained skin can lead to serious health issues if not addressed promptly by the keeper. Observing pre-molt signs, such as dull coloration or behavioral shifts, allows for timely adjustments. A successful molt is a strong indicator of good husbandry and animal health.
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
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