The answer is animals with a low surface area to volume ratio.
Animals with a low surface area to volume ratio lose heat more slowly and can maintain their body temperature more effectively, particularly in colder environments. In contrast, animals with a high surface area to volume ratio tend to lose heat more quickly. Ectotherms, like reptiles, rely on external sources for body heat and may not have as much control over their body temperature as endotherms (warm-blooded animals) do. Amphibians also tend to be ectothermic and are generally more influenced by environmental temperatures.