If you look at the world around us, you will find that the higher the level of the food chain, the worse the reproductive ability, and those animals at the lower level of the food chain, the stronger the reproductive ability. For example, mosquitoes, rabbits, rats, these creatures have a strong reproductive ability.
The flooding of Australian hares in Australia has only taken half a century, but the rat we are talking about today is estimated to take only one or two years to become a disaster in Australia. This is the lemming.
Lemmings, mainly living in the alpine regions of Asia and Europe, such as Norway and Siberia, lemmings have a body length of about ten centimeters, usually rely on eating grass and tree roots to feed, almost no intersection with humans. In the summer. Lemmings have a maroon-red coat color, but in winter, lemmings will change their fur once and transform themselves into white.
Compared to our common house mice, lemmings generally only live for about a year. In order to continue the reproduction of the population, lemming mice have evolved extraordinary reproductive ability. From birth, lemmings only need 20 days to reach adulthood, and in its short life, it can reproduce 7 times, and each reproduction can give birth to 10-12 lemmings.
You can calculate that a pair of lemmings can breed seventy or eighty offspring a year, and these offspring also begin to breed the next generation, and through a simple step-by-step algorithm, we can calculate that in less than a year, lemmings can reach hundreds of thousands.
Therefore, lemmings will not only not face a species crisis, but will always usher in a population-scale outbreak, so every time the number of lemmings exceeds the environmental carrying capacity, lemmings will lead their offspring to migrate from cold and dry places to areas with humid climates. This migration of lemmings is actually a deadly journey, and less than one-third of lemmings can reach their destination each time.
This may be the wisdom of lemmings, which use migration to control the size of the population. What do you think?