Should or Shouldn't

I reach for the bird from underneath the desk
It chirps and chirps as my hand grows ever closer
It doesn't fly but It doesn't sit still
It's blue wings aren't clipped but still it refuses to fly
The bird chomps at the giant worm that is my index finger
Should've just left it

I ignore the bird from underneath the desk
It chirps and chirps but I refuse to respond to it's cry
I can hear it jump around but I don't hear flapping
I can't hear much else, why doesn't it just fly away
I walk away feeling my chest begin to get heavy
Should've tired getting it

I know there's a bird under the desk
What would happen if I tried to catch it
What would happen if I left it alone