The oil spill killed the much of the vegetation that serves as a nesting ground for pelicans and other migrating waterfowl .
石油泄漏杀死了大量为塘鹅和其它迁徙水鸟提供筑巢空地的植被。
Researchers graham laver and robert webster discover that waterfowl are the natural hosts of influenza viruses .
研究者grahamlaver和robertwebster发现水禽是流感病毒的天然宿主。
Because waterfowl have normal body temperatures between 103 and 106 degrees fahrenheit ( 39 and 41 celsius ) , heat loss in the water can be fatal .
由于水鸟的正常体温为华氏103到106度（摄氏39到41度），所以在水中热量的丧失将会是致命的。
The yukon delta is an important habitat for waterfowl and migratory birds , and most of the protected refuge is less than 100 feet ( 30 meters ) above sea level .
