On the Meshcherskaya side, in the Oksky Nature Reserve, there is a nursery for rare species of cranes. Here the chicks of the Siberian Crane are raised, a snow-white crane that is on the verge of extinction in nature. When the chicks grow up, they will be released into the wild in distant Siberia, and a motorized hang glider will show them the safest route for their annual migration to warmer climes. How to teach crane babies to trust a hang glider? Is it possible to replace their mother bird and prepare the babies for survival in the wild, outside the aviary of the reserve? Where they will have to avoid meeting people... Fragments of the book were published in the magazines “In the Animal World”, “Young Naturalist”, “Ecology and Life”, “Pipe”.