They are known to be quite aggressive. They will arch their back as a warning if they feel disturbed or threatened.
Males may spray a foul smelling gas. Nymphs (young) live high up in branches until they are fully grown after about 6 months. Then they will move to the ground and live there for the rest of their lives. Females are pathogenic so they can lay eggs without the need for males. Males can fight for mates if there aren’t enough females and this can lead to injury or even death.