In British Columbia, the Northern Rubber Boa hibernatesDefinition:Term to describe a period of dormancy in animals, usually as a response to low external temperatures during which most metabolic processes are slowed, including respiration and thermoregulations. throughout the winter in rocky crevices, root hollows, or old mammal burrows that dip below the frost line. When temperatures are warm enough in the spring, they emerge from overwintering dens but remain concealed for much of this emergence period, which can last several weeks. Once daytime temperatures are warm enough (typically above 20 degrees Celsius), they will disperse into their summer range. Rubber Boas can be found in a variety of habitats including woodlands, grasslands, coniferous forests, dry pine forests, juniper woods, and riparian areas. Although they are able to occupy a variety of habitats, they generally avoid hot, dry areas and prefer more humid and mountainous areas. Within their habitats, cover objects and burrows are important microhabitat features and they spend most of their lives either concealed or underground. During the spring Rubber Boas are active during the day to avoid the cool nights, but in the summer, they are primarily nocturnalDefinition:Active during the day. to avoid the arid days.