Lizards have breeding seasons determined by cycles of photoperiod, temperature (most common), rainfall, and food availability. A corresponding fluctuation can be seen in male lizards and testicular size. Male lizards may also undergo [[Lizard Behaviour|behavioural]] changes during breeding season and become more territorial and aggressive. | Lizards have breeding seasons determined by cycles of photoperiod, temperature (most common), rainfall, and food availability. A corresponding fluctuation can be seen in male lizards and testicular size. Male lizards may also undergo [[Lizard Behaviour|behavioural]] changes during breeding season and become more territorial and aggressive. |