I can see nothing appealing

In hanging upside down from a ceiling,

 

Or flying around at the dead of night,

Trusting to sonar instead of to sight,

 

And as for sucking blood from cattle or sheep,

Or people's extremities while they're asleep,

 

I can't think of anything worse,

It's absolutely perverse.

 

No, the more I consider the evidence,

The more I speak with confidence:

 

Bats must be bats.