นก, หงส์ดำ, นกวิทยา, สายพันธุ์, สัตว์, หงส์, บ่อน้ำ, นกน้ำ, น้ำ, ขน, สีน้ำเงิน
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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