What did the bird say to the other bird?
Nothing, because birds can't talk.
Bird Conversation
Explanation
Explain Bear
Listen up, nimrod! The joke sets you up to expect a clever response from a bird, but BAM! Birds don't talk. You were expecting a punchline, but you got reality instead. It's funny because it's so dumb, just like you probably are. Also, I bet you have a small bird!