Tabbed from a live show at The House Cafe in DeKalb, IL on 04-23-15, at which Casey performed a solo show.
Capo on 2nd fret
Some notes: 
Em9 is played 020002
Em9* is played by moving the C chord up to the 5th fret like x54030
G/D or G6 is played like 320030, but at times it was difficult to figure out whether he was playing a G or a G6
INTRO 
(fingerpicking) G6 Em G6 Em (x2)
VERSE 1 
G6 Em G6 Em
You say you're lonely,
G6 Em9 G6 Em9
I'm lonely too.
G6 Em G6 Em
You say you need me,
G6 Em9 G6 Em9
I need you.
PRECHORUS
C  
With all the false prophets,
Em9* Em G6 D
you deserve a chance to speak.
Em C                         
Got a problem and I'll solve it,
Em9*
and erase this suffering.
G6 Em9 G6 Em9 
CHORUS
C 
Won't you swoop down,
Em9*
and catch another mouse;
C
Why don't you swoop down,
Em9*
to catch another mouse 
C
Why don't you swoop down,
Em9*
to catch another mouse 
        G6 Em9 G6 Em9
for me?
PRECHORUS 2
C
Do you really want to feel helpless,
Em9* Em G6 D
with your hands behind your back?
Em C
Waiting idle for a blessing,
Em9*                        G6 Em9 G6 Em9
or until complete collapse?
CHORUS
C
So won't you swoop down,
Em9*
and catch another mouse;
C
Why don't you swoop down,
Em9*
to catch another mouse;
C
Why don't you swoop down,
Em9*
to catch another mouse
BRIDGE
Am7 Em
Whoa...
Am7 G D
Whoa...
Am7 Em
Whoa...
Am7 G D
Whoa...
CHORUS
C
So won't you swoop down,
Em9*
and catch another mouse;
C
Why don't you swoop down,
Em9*
to catch another mouse;
C
Why don't you swoop down,
Em9*
to catch another mouse
for me?
LEAD OUT
G6 Em9 G6 Em9
End on G