The pupils of the school forestry units participate in the organization of the bird eating-houses in the forest areas, school yards, city and rural parks where they hang bird feeders, which do not remain empty: several times a week they are filled with sunflower seeds, millet, breadcrumbs. The staff of forestries and nature sanctuaries tells pupils and fosterlings about the forest and its feathered inhabitants left to hibernate in their native lands, and answers questions from the kids.