A wild duck (Anas platyrhynchos) of which the male has a green head and neck. Most domestic ducks descend from the mallard.
一种野鸭（绿头鸭），其雄鸟具有绿色的头和颈。大部分驯化了的家鸭都是绿头鸭的后裔。
A wild duck(Anas platyrhynchos)of which the male has a green head and neck. Most domestic ducks descend from the mallard .
绿头鸭一种野鸭（绿头鸭），其雄鸟具有绿色的头和颈。大部分驯化了的家鸭都是绿头鸭的后裔。
A small North American diving duck(Bucephala albeola) having black and white plumage and a densely feathered, rounded head.
巨头鹊鸭一种体型小的北美潜水鸭（巨头鹊鸭），有黑白色的羽毛和稠密的毛，圆脑袋。
A infectious disease of duck with the characteristic of "swollen head" is researched in this article. The epidemic characteristic, symptom and pathological changes are described.
本文对成都地区流行的以头颈肿胀为特征的鸭传染病进行研究，描述了该病的流行特点、临床症状、病理解剖变化。
A infectious disease of duck with the characteristic of "swollen head" is researched in this article. The epidemic characteristic, symptom and pathological changes are described.
本文对成都地区流行的以头颈肿胀为特征的鸭传染病进行研究，描述了该病的流行特点、临床症状、病理解剖变化。
应用推荐