That's why all of human's yukkuri extinction projects ended up failed.As omnivores, nutrition sources from wild grass to the faeces of animals can be eaten and digested by yukkuris, allowing them to multiply no matter how harsh their living environment is.Slight stimulation is enough to make them come into estrus, and their rate of pregnancy is almost one hundred percent.
As a single fertilization can breed multiple offsprings, yukkuris' fecundity is even more powerful than mice.It is because they have powerful fecundity and high food intake.