What happens if a bird flies into a hot air balloon?

Do you mean into the exterior side of the balloon, or into the interior space of the balloon? Since birds can see, it's rather unlikely that a bird would fly into the exterior side of a balloon. read more

Basically nothing happens when a bird hits a hot air balloon. First of all a balloon is pretty big and pretty slow. So it's nearly impossible to surprise a bird with a balloon. In the rare case that it happens, the bird will fly into the balloon and bounces right out. The bird doesn't have the capability to fly through the fabric. read more

Balloons are so large that most birds avoid them. The envelope fabric is much tougher than it might appear and a bird would likely bounce off if there were a collision! Balloon manufacturers have performed tests, and it is possible to fly a balloon even with a hole. read more