bird is

• The two birds were pluming their wings on the tree
  两只鸟正在树上整理他们的翅膀。
• These beautiful birds are fast disappearing
  这些美丽的飞鸟正很快面临灭种。
• Birds are not the cause of japanese encephalitis
  2004年6月24日雀鸟并非日本脑炎诱因
• How many birds are there in the tree ? hardly any
  树上有几只鸟？几乎没有。
• This bird is an unusual winter visitor to britain
  这种鸟很少冬季到英国来
• Birds are singing on the green wand outside my window
  鸟儿在我窗外绿色的嫩枝上歌唱。
• The birds are flying south in search of warm sunshine
  那些乌往南飞在寻找温暖的阳光。
• A bird is in a cage1 outside a window
  挂在窗口笼里的金丝雀经常在鸟儿睡着的夜里歌唱。
• The bird is known by his note , the man by his woed
  闻音知鸟，闻言知人。