Watch Free Online HD Moviesjoy. A documentary about the diversity of bird life in the wetlands of eastern Slovakia and the work of bird ringers. This is not just a film about the diversity of bird life, it is also about bird ringers and their assistants: an SBS guard at a nuclear power plant, an employee of the East Slovak Museum, a pensioner, an employee of the Slovak Karst National Park, a veterinarian, a zoo employee, a zoologist from the museum, a gas station attendant from Rimavská Sobota, an unemployed person, students from Comenius University in Bratislava, who spend more than 100 days a year at the station below Turniansky Castle.