Low pathogenic avian influenza commonly occurs in wild birds and can be found in a number of duck populations including the Northern pintail.
低致病禽流感病毒通常出现于野禽，并且可以在很多鸭类包括北长尾鸭中找到。
The U. S. Departments of Agriculture and Interior today announced a detection of the H5 and N1 avian influenza subtypes in samples from wild Northern pintail ducks in Montana.
美国内务部和农业部今天发表声明：在蒙大拿的野生北长尾鸭样本中发现H5和N1禽流感病毒亚型。
Lesser Scaup Aythya affinis, Northern Pintail Anas acuta, and several sea ducks are showing troubling declines, but most geese are increasing dramatically and many ducks have held steady.
一些鸟类如针尾鸭和海鸭等的数量仍然在下降，但是大多数雁类的数量都有了明显增加，很多鸭子的数量也保持稳定。
Lesser Scaup Aythya affinis, Northern Pintail Anas acuta, and several sea ducks are showing troubling declines, but most geese are increasing dramatically and many ducks have held steady.
一些鸟类如针尾鸭和海鸭等的数量仍然在下降，但是大多数雁类的数量都有了明显增加，很多鸭子的数量也保持稳定。
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