migratory birds

基本解釋

In the fall of the year the short days and long nights cause the "clocks" in migratory birds to undergo a kind of "winding" in preparation for their spring return and breeding.
每年秋季，短暫的白晝和長時間的黑夜令候鳥身體里的“時鐘”經(jīng)歷某種轉變，為它們春天的返回和繁殖做準備。
WHO recommends heightened surveillance for outbreaks in poultry and die-offs in migratory birds, and rapid introduction of containment measures, as recommended by FAO and OIE.
世衛(wèi)組織建議加強對家禽中暴發(fā)和候鳥中死亡的監(jiān)測并按照糧農(nóng)組織和國際獸疫局的建議迅速采取控制措施。
But as oil from the Deepwater Horizon spill in the Gulf of Mexico moves closer to shore, the migratory birds are among up to 400 coastal species that could be affected, biologists say.
但是，由于從墨西哥灣深水地平線鉆井平臺溢出的原油正日益逼近海岸，導致小燕鷗這種遷徙鳥類以及其他400種沿海生物的生存遭受影響。

Hui said the pigeons were probably infected by wild or migratory birds, whose droppings can carry viruses.
NPR: China Kills Market Birds As Flu Found In Pigeons
Apart from aesthetics, the threat to migratory birds is the most frequently cited argument against wind farms.
ECONOMIST: Wind energy and politics
In Nigeria, there is the suggestion that it was trade, and not migratory birds, that caused the outbreak.
ECONOMIST: The aves, and ave nots

候鳥
The Poyang Lake is China’s largest freshwater lake, also one of the important habitats for migratory birds in the world.
鄱陽湖是中國最大的淡水湖泊,是全球候鳥重要的越冬棲息地。
侯鳥