Do caribou migrate the same distance each year?
Based on several years’ observation of satellite-collared animals of the Porcupine Caribou herd, caribou do not migrate the same distance each year. This is because they often use different portions of their winter range from year to year. (By using this strategy, caribou are able to eat winter food over a wide area, which reduces the possibility of eating up all the available food in any one area.) There are different migration routes leading from the various portions of winter range, so caribou migrate different distances each year.
