canada goose an goslings

anatidae animals avifauna beak bird black body bolsena branta brown canada canadensis care daylight environment europe face family flight float floating goose goslings growing grows growth head herbivorous italy its lago lake latium migratory monogamous morning natural nature neck ornithology ornitologist outdoor parental patches plumage protective reproduction riva season seasonal shore springtime sulla sunlight sunny swim viterbo water white wild wings zoology