Mating involves long pairings. A record among insects, the Indian stick insect "Necroscia sparaxes" was seen coupled for 79 days at a time. It is not uncommon for this species to assume the mating posture for days or weeks on end, and among some species ("Diapheromera veliei" Walsh and "D. Covilleae"), pairing has been seen to last three to 136 hours in captivity.