The cranes, whose lives depend on their flocks, move to different countries every winter. Natural and unnatural extinction of Siberian cranes are a matter of concern to global environmental organizations. Last year, only two male and female birds migrated to Iran, hoping to increase their numbers by mating. But this winter biologists only saw the male flying over Iran’s sky, which they considered evidence of the inevitable destruction of this rare species. Cranes cannot survive in solitude. You listeners! Imagine if this lonely crane—