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神栖市--利根川--日立利根川葦原 (Kamisu--Tone River--Hitachitonegawa reedbeds)
Illustrated Checklist
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Native and Naturalized (93)
Hybrids (1)
- Mallard x Eastern Spot-billed Duck (hybrid) Anas platyrhynchos x zonorhynchaLast observed by Anonymous eBirder on 26 Aug 2023