Inland areas are warmer in summer and colder in winter. Temperatures can vary significantly over the course of a month with warmer and colder weather. It tends to grow longer in colder climates. It is less active in colder and drier periods. When kept in colder climates, aquarium heaters are recommended. However, bumblebees have been seen to fly in colder ambient temperatures. In colder regions, snakes hibernate during winter. Heat spontaneously flows from a hotter to a colder body. It is also grown as a houseplant in places with colder climates. This proves a great compromise for those in dryer/colder/hotter climates. Fire-related burns are generally more common in colder climates. Its elevation makes it colder and wetter than the rest of Anhui. Domesticated horses are brought to colder and wetter areas than their ancestral habitat. In colder and wetter climates, an enclosing "shoeboot" was preferred. The Nordic Bronze Age ended with a deteriorating, colder and wetter climate.