41. The best known of the stick insects is the Indian or laboratory stick insect ( " Carausius morosus " ). 42. Insect species include the endangered Dragonflies, stick insects , jewel beetles and the praying mantis are other insects located in the reserve. 43. Adult Lord Howe Island stick insects can measure up to in length and weigh, with females 25 % smaller than males. 44. Stick insect have forewings that are tough, opaque tegmina, short and covering only the base part of the hindwings at rest.45. Also, the chemical defenses ( secretions, reflex bleeding, regurgitation ) of the individual stick insect are enhanced when two are paired. 46. From Winter to Autumn, ( winter laid autumn hatched ) the eggs will hatch, forming an army of baby stick insects . 47. Following the last sighting of the Lord Howe Island stick insect on Lord Howe Island in 1920, the species was presumed extinct. 48. Research has been conducted to analyze the stick insect method of walking and apply this to the engineering of six-legged walking robots. 49. The botanical illustrator Marianne North ( 1830 1890 ) painted leaf and stick insects that she saw on her travels in the 1870s. 50. Several Mesozoic families appear to be related to the phasmids, and are generally but not universally agreed to be stem group stick insects .
