ฮิปโปโปเตมัส, สัตว์, ธรรมชาติ, ฮิปโป, เลี้ยงลูกด้วยนม, ศัตว์ซึ่งกินพืชเป็นอาหาร, สวนสัตว์
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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