The red fox is distributed across Eurasia and North America, throughout the Northern Hemisphere. The red fox is the largest and most common fox, with a tail gland that emits a peculiar odor. The red fox has a cunning temperament, a strong memory, a welldeveloped sense of hearing and smell, and a quick and durable action. When encountering hostile, red fox will be from the anal glands of the secretion of almost can make other animals suffocate "fox odor", the stench of the odor so that the pursuer had to stop. In critical situations, the red fox can also escape by scurrying into the flock, jumping into the river to hide and other methods. Caught by the hunters of the red fox, can temporarily breathe weakly, pretending to be dead, an opportunity to suddenly and quickly escape. These cunning behavior, are the red fox superior means of survival.