Ключевые слова: animal, bird, coast, danube, day, dirty, drain, drainage, environment, europe, fauna, feeding, flock, flow, fly, fortress, group, gull, landmark, many, natural, nature, novi sad, outfall, outflow, petrovaradin, polluted, pollution, river, seagull, serbia, sewage, sewer, sewerage, sunny, surface, travel, vojvodina, water, water pollution, white, wild, wildlife,