Their mean body temperatures also change depending on where they are located. If the male lizard was in a montane habitat or a desert habitat their body temperature would be 35 degrees Celsius, but if the male lizard was in a desert riparian habitat its body temperature would be around 38 degrees Celsius. Their changes in body temperatures reflect the climates they live in. These temperature differences also occur between male and female lizards. On average the body temperature of a female is lower than the males body temperature. There is a possibility that this difference in body temperature could be related to the presence or absence of sexual differences between males and females and could also affect the health of the clutch and the size of the clutch. Size The size of each lizard is closely related to their age and the seasonal state of their environment. During winter months (January through March), 75% of adults and 25% of juveniles are active and 13% of juveniles are active in the spring season. Additionally, at the beginning of April, 87% of the ornate tree lizards are in a reproductive state. This is because the beginning of April marks the beginning of their breeding season. By the month of May, however, all the lizards have reproductive potential. Growth The lizards will reach their minimum adult size within a year. Male ornate tree lizards will grow approximately 0.16 to 0.29 mm per month. During the spring and summer seasons, however, the male growth rate increases to an average of 2.1 mm per month. Female ornate tree lizards are typically smaller than males when they reach adulthood. When the females grow to 45 mm, they are considered 'mature'. For males, there is a small range in their size. Researchers have proposed that there is a stabilization in growth rate as they approach their maximum size. Locomotion These lizards tend to be active during every month except December. Both male and female ornate tree lizards emerge only on the warmest days in November and January, however, they engage in extended period of activity in February. When the lizards are active, they tend to occupy open locations in small or large boulders. Anti-predator behavior Male Usosaurus ornatus lizards express chemical and behavioral responses to predators. Chemical responses of the males when encountering a predator can include changes in their levels of testosterone and corticosterone while