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Keywords from Image Description:
Bdg Wisa zima . pl Wisa Brdyujciu Bydgoszczy Zima own Pit Vistula in Bydgoszcz Brdyujcie Vistula in Bydgoszcz Winter in Bydgoszcz Frozen rivers of KuyavianPomeranian Voivodeship Vistula Swans of Bydgoszcz Birds of Bydgoszcz Cygnus olor swimming in mixed species flocks Cygnus olor swimming flocks mixed adult and juvenile