Chords: 
   G      G7     C      C5     D      D?     D7     Em 
  e-3-   e-1-   e-0-   e-3-   e-2-   e-x-   e-2-   e-0- 
  B-3-   B-0-   B-1-   B-1-   B-3-   B-3-   B-1-   B-0- 
  G-0-   G-0-   G-0-   G-0-   G-2-   G-0-   G-2-   G-0- 
  D-0-   D-0-   D-2-   D-2-   D-0-   D-4-   D-0-   D-2- 
  A-2-   A-2-   A-3-   A-3-   A-x-   A-5-   A-x-   A-2- 
  E-3-   E-3-   E-x-   E-x-   E-x-   E-x-   E-x-   E-0- 
 
Verse 1: 
  G     Em            C 
  Yesterday I went outside 
          D?             G 
  With my Mother's Mason jar 
             Em         C  * 
  Caught a lovely butterfly 
  G      Em        C 
  When I woke up today 
            D?          G 
  Looked in on my fairy pet 
            Em          C  *    
  She had withered all away 
                          D7 
  No more sighing in her breast 
 
                        G 
  I'm sorry for what I did 
         Em            C 
  I did what my body told me to 
      D                    G 
  I didn't mean to do you harm 
         G7              C              D 
  Every time I pin down what I think I want 
            G 
  It slips away 
      Em           C5 
  And oh it slips away 
 
https://www.coveralia.com/acordes/butterfly--live--weezer.php
Verse 2: 
  Smell you on my hands for days 
  Couldn't wash away the scent 
  I'm a dog and you're a bitch 
  I guess you're as real as me 
  Maybe I can live with that 
  To excite my fantasy 
  Life of chasing butterfly 
 
Chorus 
 
Verse 3: 
  G       Em           C 
  I told you that I'd return 
            D?               G 
  When the robin builds his nest 
               Em            C   * 
  But I ain't never comin' back 
 
End part: 
   G 
  I'm sorry 
      Em 
  I'm sorry 
      C5      G 
  I'm sorry. 
 
 
That's about it, except for that little ditty where the stars are. 
It goes something like this: 
 
    e-0-----2-----------: 
   B----3--1--0-----0--: 
   G-------2-----2-----: 
   D-------0-----------: 
   A-------------------: 
   E-------------------: