Birds actually like to stick their heads in things and chirp/sing because of the way the sound waves bounce off the inside. It’s like the birb version of when you yell HELLOOOOO into a canyon to hear the echo 🙂
If I were a billionaire I would absolutely tell my secretary to send wedding gifts to anyone who sent me an invite regardless of if I knew them, because- A. I know how expensive that nonsense is. B. I would be a billionaire and when else am I gonna do with that much money? Honestly… and C. I would totally make showing up at random weddings with crazy awesome gifts my new stress relief hobby. “Congratulations random strangers! I admire your daring and stratigic planning. Here’s that 700$ tea set you wanted but assumed no one would ever buy.”