Lizards are ectothermic animals, which means their body temperature depends on the external environment. They rely on external heat sources, such as sunlight, to regulate their body temperature. This is why you often see lizards basking in the sun.
During colder seasons, such as winter, the ambient temperature drops, making it difficult for lizards to maintain their body temperature at an optimal level. As a result, they become less active and tend to seek shelter to avoid the cold. Many lizard species go into a state of reduced activity or hibernation during the colder months to conserve energy and survive the unfavorable conditions.
In the summer, when temperatures rise, lizards are more active and come out of their hiding places to bask in the sun. The increased warmth allows them to raise their body temperature and become more agile and alert. Warmer temperatures also promote higher metabolic rates, which in turn increases their activity levels, including hunting for food, mating, and defending territories.
It's worth noting that while lizards are generally more active in the summer, different species have different temperature preferences and activity patterns. Some lizards may be more active during the cooler parts of the day, while others may be more active in the early morning or late afternoon to avoid excessive heat. Additionally, certain lizard species may have adaptations that enable them to thrive in colder climates and remain active throughout the year.