Did you know there is such a bird, a thumper-bird, a parpur?
If you touch it's chest-once-gently-its heart stops beating and it dies.
One must not make a single wrong move wiht this bird, because any tiny mistake sends a delicate impact to its heart and it just stops beating.
I would buy a flock and let them fly here, above what I am writing you.
So they could be living lie detectors.
Imagine, if you will: one false or inexact word, or one that is rude, or just indifferent-and a dead bird falls on the page.
Then you will see how I write to you.

- A quotation from David Grossman's novel 'Be My Knife'.