This is not gonna be especially useful to the average Joe, but who knows who might see this. What do I know?
Installement #1. If you hold a terrified-out-of-his-pinhead-sized-brain bird (in my case a Starling), he will most likely poop on your hand.
One more thing. The amount of poop such a small bird can expel is rather disproportionate to the size of the bird.