Jennie Tiderman-Osterberg lets loose a high-pitched call into the Swedish forest, her voice rising and falling in a haunting, eerie melody.
The echo reverberates through the woods and moments later, three cream-and-black cows emerge from the trees. The bells around their necks jingle as they make their way toward her to return to their shed.
This is kulning a form of Scandinavian cattle-calling dating back to the Middle Ages. Once these calls rang out from summer farms across central Sweden as farmers brought their animals back from the woods after a day of grazing.
Many of the farms vanished as Sweden industrialized