Há alguma diferença entre hibernação e brumagem nos animais ectotermicos o termo correcto é mesmo brumagem

a maior parte de nós erradamente, incluindo eu, dizemos hibernar.
http://en.wikipedia.org/wiki/Dormancy
Brumation
Brumation is an example of dormancy in reptiles that is similar to hibernation. It differs from hibernation in the metabolic processes involved.
Reptiles generally begin brumation in late fall (more specific times depend on the species). They will often wake up to drink water and return to "sleep". Captive reptiles should not be offered food during this time, as the temperature is too low for them to digest their meal. They can go months without food. Reptiles may want to eat more than usual before the brumation time, but will eat less or refuse food as the temperature drops. However, they do need to drink water. The brumation period is anywhere from 1-8 months depending on the air temperature and the size, age, and health of the reptile. During the first year of life, many small reptiles do not fully brumate, but rather slow down and eat less often. Brumation should not be confused with hibernation; when mammals hibernate they are actually asleep, when reptiles brumate they are less active, their metabolism slows down so they just don't need to eat as often. Reptiles can often go through the whole winter without eating. Brumation is triggered by cold weather/lack of heat, and the decrease in the amount of hours of daylight in the winter.
Hibernation
Main article: Hibernation
Hibernation is a mechanism in many animals to escape cold weather and food shortage over the winter. Hibernation may be predictive or consequential. An animal prepares for hibernation by building up a thick layer of body fat during late summer and autumn which will provide it with energy during the dormant period. During hibernation the animal undergoes many physiological changes, including decreased heart rate (by as much as 95%) and decreased body temperature. Animals that hibernate include bats, ground squirrels and other rodents, mouse lemurs, the European Hedgehog and other insectivores, monotremes and marsupials.
http://lllreptile.com/info/library/care ... brumation/