birdlife ['bɜ:dlaɪf]

例句:

• All the big game congregate here, and birdlife is particularly prolific.
  所有的大型野兽都聚集在这里，鸟类尤其丰富。
  
• The skies are virtually devoid of birdlife.
  天空中几乎没有任何鸟的踪迹。
  
• Our trees are still bare, but skies and lakes bristle with birdlife.
  来自THETIMES
• Now the same thing is happening with birdlife migrating to and from the tropics.
  来自VOA
• The music falls away to be succeeded by birdsong, woodpigeons, sheep, ticking clocks, flocks of starlings, marshland birdlife.
  来自BBC