鸭类，包括北长尾鸭，被大量猎杀。
Duck populations, including Northern pintail ducks, are commonly hunted.
为保护好兰州市区越冬雁鸭类，本文对改善城市环境结构提出了几点建议。
In order to protect the Anseriformes in Lanzhou, suggestions for the improvement of the urban environmental structures are given here.
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。
Low pathogenic avian influenza commonly occurs in wild birds and can be found in a number of duck populations including the Northern pintail.
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