Many of us keep birds in a cage with the objective of entertaining themselves. As for the birds that could simply means spending the rest of their lives equivalent to imprisonment.
Bird are born to fly just as fish are meant to swim in water. Why confine them for our own selfish means? Birds with the freedom to fly will always remind us that human are born free but choose to remain stuck in some form of ignorance.
In the following video we can still see how this person allow the birds to remain free to fly and yet being amused by them when he decides to feed them.