นก, เที่ยวบิน, ห่าน, ธรรมชาติ, การโยกย้าย, แคนาดา, ฝูง, นกน้ำ, ท้องฟ้า, ป่า, การบิน
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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