system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5 how do they train pigeons to deliver messages from far away?

How do those pigeons know where to fly?
gpt
Homing pigeons know how to fly back to their own roost. So to send a message, you have to have a bird that’s from the location you’re sending to, and then you just let it go back home instead of keeping it caged where you are at. It’s not really something they’re trained to do.