นก, หงส์ดำ, นกวิทยา, หงส์, สายพันธุ์, สัตว์, ธรรมชาติ, ขน, น้ำ, จะงอยปาก, บ่อน้ำ
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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