 On the contrary, increases in female head size are met with a proportionate increase in hind limb length and no decrease in speed.Though both sexes use escape sprinting as a survival strategy, males are more likely to need to stop and fight using biting, due to the reduced mobility caused by disproportionate head to hind leg size, which in turn is correlated with localised territorial behaviours.The success of the common house gecko can also be explained through other elements of competition, such as postural displays and movement patterns.