motacilla flava and motacilla cinerea dancing and singing in the stream

adaptation animal balance behavior bioacoustic biodiversity biomes breeding conservation courtship distribution ducks ecological ecosystem environmental family feathers feeding flight flocking flower foraging garden grass habitat habitats insectivorous juveniles longevity mating migration migratory monitoring natural nature nestbuilding nesting parental passerine patterns plant plumage predation predatorprey predatory protection regions river riverbank routes seasonal sites social songbirds sources stream streams structures territoriality territory undefined vocalizations wagtail water waterbird wetland wetlands wilderness wildlife woodland