Why don't birds collide with each other in flying?

 

20250101

"Why don't birds collide with each other in flying?"

 There are lots of pigeons in Hong Kong streets.  They will fly suddenly if someone approaches.

 Hundreds of birds will cover the sky in seconds.

 But they will never collide with each other.

 If they were not birds,  if they were drones, you need to plan ahead to arrange for them each a route to fly.

 Do birds have a plan also?

 Will each of the birds fly with its own brain or they have a common network in flying?

 It is not easy to prove such network exists.

But it is not difficult for humans to "feel" the distance of others walking nearby.

 There must be some links between the brains.

 Humans are evolving not only individually.

 Humans will have a sense stronger and stronger to feel with each other.

 It is fun.  

 And sometimes it can save your life,  if you can be alerted a little earlier.

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