That's a cute story!
I've only got one budgie, so he doesn't plot with a buddy the way yours do. But he is sneaky!
Recently, I've noticed that he talks to a little green plastic bead that's on the ladder I built him. It's shaped like a turtle and sometime I'll catch my budgie leaning over to "whisper" to the turtle. It's funny because my budgie recently started talking in English a couple weeks ago, so he'll talk to the turtle, make kissing noises, asking " what are you doing?" and telling the turtle he loves it. When my budgie sees me peeking he'll suddenly straighten up, turn his back on the turtle and start chirping normally, as if I didn't already know that he could speak.
I think he and the turtle bead have plans to elope.
