Cranes (Grus grus) are migratory birds that form pairs for life. They come to us in spring to their breeding grounds. They build their nests in wetlands, among reeds and sedges, most often in alder forests. They usually have one or two young. In autumn, entire families of cranes gather into huge flocks and begin to migrate to wintering grounds. These spectacular cranes can be clearly heard in the sky from mid-September, October and even until mid-November. They are accompanied by a characteristic sound called a clangor. Sometimes, among the flying flights of cranes, you can hear the voices of young birds, which can be compared to single whistles (audible in the video). Cranes fly to Western and Southern Europe, and some to North Africa. In recent years, cases of wintering of cranes in Poland have been observed, which is probably related to the increasingly mild winters. Cranes migrate through Poland along two main routes: one north-central, with approximately 400,000 cranes flying, and the other east-south, with approximately 150,000 cranes flying. The second trail runs through Roztocze, so we can enjoy these extraordinary natural spectacles every autumn.