Their calving grounds are near the Beaufort Sea, but they make this journey each time they need to. The migration of the Porcupine caribou is considered to be the longest land migration of terrestrial mammals. They prefer places where there are not trees and in open spaces like the coastal tundra. Every year they move around the same area, but sometimes they change their route after having the same one for many years to places where they can find more food. It can bring a problem for the Native people who has caribou as part of their diet.
Depending on what time of year it is, you will see them in different locations according to their migration pattern. They are herbivores and feed on insects, flowers from the tundra, and when this declines, they move out and continue to feed on willow leaves and mushrooms. They are always in constant movement looking for better food places, and sometimes they travel up to 400 miles between summer and winter looking, especially if it’s a bigger herd. It’s all about adapting to their environment to survive, and these beautiful creatures know well how to do it.