Hibernation the summer months is aestivation. Often associated with low temperatures, the function of hibernation is to conserve energy when sufficient food is unavailable. To achieve this energy saving, an endothermic animal decreases its metabolic rate and thereby its body temperature. Hibernation may last days, weeks, or months depending on the species, ambient temperature, time of year, and the individual's body condition. Before entering hibernation, animals need to store enough energy to last through the duration of their dormant period, possibly as long as the entire winter. Larger species become hyperphagic, eating a large amount of food and storing the energy
In the Grip of Winter In the Grip of Winter In the Grip of Winter is the second book of The Animals of Farthing Wood series by Colin Dann. It was first published in 1981, and later republished as part one of the first "Omnibus". As winter approaches Toad, Adder, and the hedgehogs go into hibernation, while the rest of the animals prepare for winter. However the winter is harsh and kills most of the field mice and voles, while making it difficult for the rest of the other animals to find food. Whistler and his mate help Fox, Vixen, Weasel, and Badger by bringing