reindeer is a primary consumer position in the food chain, feeding mainly on mosses, lichens and herbaceous plants, and are an important food source for carnivores such as gray wolves, polar bears, brown bears and golden eagles. However, reindeer may face food shortages in the future, with habitat destruction, climate change, tourism development, and population degradation convincing to reduce their food resources and threaten their living environment. Shrinking habitats and reduced food sources are making the survival of reindeer a serious challenge.