birds of a feather

1. 一丘之貉
   I'm not surprised those two are such friends; they're birds of a feather.

   那兩個人交情這麼好我不驚訝，他們是一丘之貉嘛。

A bird in the hand is worth two in the bush.

1. 雙鳥在林不如一鳥在手。

early bird

1. 早起者
   In the business world, remember: the early bird gets the worm.

   身在商業界，切記：早起的鳥兒有蟲吃。

   He's quite an early bird.

   他是個早起者。

give the bird

1. 發噓聲
   They started to give the actor the bird when they saw his performance was bad.

   他們見到那演員的演出那麼差，就開始對他發出噓聲。

• the bird has flown
  the person one is looking for has escaped or left.
• the birds and the bees
  informal basic facts about sex and reproduction, as told to a child.
• do (one's) bird
  Brit. informal serve a prison sentence. [bird from rhyming sl. birdlime ‘time’.]
• flip someone the bird
  N. Amer. informal stick one's middle finger up at someone as a sign of contempt or anger.
• (strictly) for the birds
  informal not worthy of consideration.
• give someone the bird
  Brit. informal boo or jeer at someone.
• have a bird
  N. Amer. informal be shocked or agitated.